Helppp!!!!! Please!!
A 0.144 kg baseball approaches a batter with a speed of 20m/s . The batter lines the ball directly back to the pitcher with a speed of 30m/s . Find the impulse exerted on the ball . If the bat and ball were in contact for 0.012 sec , find the average force exerted on the ball by the bat
Answer:
The impulse exerted by the ball is 7.2 kg.m/sThe average force exerted on the ball by the bat is 600 N.Explanation:
Given;
mass of the baseball, m = 0.144 kg
velocity of the baseball, v₁ = 20 m/s
velocity of the batter, v₂ = -30 m/s (opposite direction to the ball's speed)
The impulse exerted by the ball is calculated as follows;
J = ΔP = mv₁ - mv₂
ΔP = m(v₁ - v₂)
ΔP = 0.144 [20 - (-30)]
ΔP = 0.144 ( 20 + 30 )
ΔP = 0.144 (50)
ΔP = 7.2 kg.m/s
The average force exerted on the ball by the bat is calculated as;
[tex]F = \frac{\Delta P }{t} \\\\where; t \ is \ time \ of \ contact= 0.012 \ s\\\\F = \frac{7.2}{0.012} \\\\F = 600 \ N[/tex]
what is the gravitational potential energy when a bungee jumper
of 80 kg is lifted 60 m in a crane before jumping?
Sometimes an electric bulb does not glow even if it is connected to the cell. What could be the reason
Answer:
Probable Reason - Break in filament of electric bulb
Explanation:
An electric bulb might not glow even if it is connected to the cell, possibly because of break in the filament of electric bulb. As, break in bulb's filament implies break in flow of electric current - between electric cells' terminal.
An evident example of this is , a fuse bulb doesn't light up as the current doesn't pass through filament.
i dont understand ..............
Take the upward and to-the-right directions to be positive (so down and to-the-left are negative).
The vertical forces acting on the object cancel, 6 N - 6 N = 0.
The horizontal forces exert a net force of 20 N - 3 N = 17 N. This net force is positive, so it points to the right. So the answer is A.
Please physics brainlist !
29. A wave source approaches your location, describe
the shift in wavelength and frequency you will
perceive.
Answer:
The waves travel at the same speed, but the observed frequency depends on any relative motion between the observer and source. When the observed frequency changes, so does the wavelength. If the observer and source are moving toward each other, then the frequency increases and the wavelength decreases.
What can Magnetic force, electric force, and electrostatic force can all be described as.
Answer:
They can be described as non contact forces
What is the acceleration of a 78kg ostrich exerting 438N of applied force running against a wind with 42N of air friction force?
Answer:idek
Explanation: sorry
ASAP
A spring is stretched downward by a certain length and, as a result, exerts a
force in the upward direction. What happens to the force exerted by the
spring if the length by which it is stretched is reduced by half?
O A. The force exerted by the spring is reduced by half.
B. The force exerted by the spring is doubled.
O C. The force exerted by the spring reduced by one quarter.
O D. The force exerted by the spring remains unchanged.
Answer:
A
Explanation:
Hooke's law! F(spring)=-kx
There's no tricky square law here. The spring constant doesn't change, only x (distance stretched) changes. Therefore, if distance is halved, Force will be halved.
Certain specialised devices can be more than 100% efficient. True or false?
Certain specialized devices can be more than 100% efficient is referred to as a false statement.
What is Efficiency?This is referred to as a way of measuring how much energy can be conserved in a process. On the other hand, energy is the ability to do work and can be lost through various means such as heat.
It is not possible to have an efficiency of 100% because it means that there will be more energy being transferred than what is being supplied which would break the law of conservation of energy and is therefore the reason why false was chosen as the correct choice.
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Please answer this question.
Answer:
150.15 J
Explanation:
From the question given above, the following data were obtained:
Mass (m) = 5 kg
Height (h) = 3 m
Kinetic energy (KE) =?
Next, we shall determine the velocity of the toy before hitting the ground. This can be obtained as follow:
Initial velocity (u) = 0 m/s
Height (h) = 3 m
Acceleration due to gravity (g) = 9.8 m/s²
Final velocity (v) =?
v² = u² + 2gh
v² = 0² + (2 × 10 × 3)
v² = 0 + 60
v² = 60
Take the square root of both side
v = √60
v = 7.75 m/s
Thus, the velocity of the toy before hitting the ground is 7.75 m/s.
Finally, we shall determine the kinetic energy of the toy before hitting the ground. This can be obtained as follow:
Mass (m) = 5 kg
Velocity (v) = 7.75 m/s.
Kinetic energy (KE) =?
KE = ½mv²
KE = ½ × 5 × 7.75²
KE = 2.5 × 60.06
KE = 150.15 J
Thus, the kinetic energy of the toy before hitting the ground is 150.15 J
last question, can someone help please?
100%
Sutt S
Kam Scheela MARIO MARTINEZ-HTPhysics.pdf
Test BGK
HW#10
Question: A pinball machine's plunger has a spring constant of 22
N/m and is compressed by 0.04 m to start a 0.006 kg pinball.
1. What is the elastic potential energy before the ball is released?
2. What is the kinetic energy of the pinball the instant it leaves the
spring?
3. What is the speed of the pinball the instant it leaves the spring?
4. If the pinball is moving at 1.3 m/s as it is deflected horizontally
across the top of the pinball machine, how much higher above the
ground is this part of its path when compared to its starting
position?
Squation
Drawing
Ta
Signature
Instructions.
Answer:
1. The elastic potential energy is 0.0176 Joules
2. The kinetic energy of the pinball the instant it leaves the spring is 0.0176 Joules
3. The speed of the pinball the instant it leaves the spring is approximately 2.42212 m/s
4. The height of the part where the pinball is located on the machine above the ground is approximately 0.213 meters
Explanation:
The spring constant of the pinball machine's plunger, k = 22 N/m
The amount by which the pinball machine's plunger is compressed, x = 0.04 m
The mass of the pinball ball, m = 0.006 kg
1. The elastic potential energy, P.E. = 1/2·k·x²
By substitution, we get;
P.E. = 1/2 × 22 N/m × (0.04 m)² = 0.0176 J
The elastic potential energy, P.E. = 0.0176 J
2. At the instant the pinball leaves the spring, the plunger and therefore the force of the plunger no longer acts on the pinball
Since there are no external forces acting on the pinball to increase the speed of the pinball after it leaves the spring, the velocity reached is its maximum velocity, and therefore, the kinetic energy, K.E. is the maximum kinetic energy which by the conservation of energy, is equal to the initial potential energy
Therefore;
K.E. = P.E. = 0.0176 J
The kinetic energy of the pinball the instant it leaves the spring, K.E.= 0.0176 J
3. The kinetic energy, K.E., is given by the following formula;
K.E. = 1/2·m·v²
Where;
v = The speed or velocity of the object having kinetic energy K.E.
Therefore, from K.E. = 0.0176 J, and by plugging in the values of the variables, we have;
K.E. = 0.0176 J = 1/2 × 0.006 kg × v²
v² = 0.0176 J/(1/2 × 0.006 kg) = 88/15 m²/s²
v = √(88/15 m²/s²) ≈ (2·√330)/15 m/s ≈ 2.42212 m/s
The speed of the pinball the instant it leaves the spring, v ≈ 2.42212 m/s
4. The height of the pinball is given by the following kinematic equation of motion;
[tex]v_h[/tex]² = u² - 2·g·h
Where;
[tex]v_h[/tex] = The velocity of the pinball at the given height = 1.3 m/s
u = v ≈ 2.42212 m/s (The initial velocity of the pinball as it the spring)
g = The acceleration due to gravity ≈ 9.8 m/s²
h = The height of the pinball above the ground
We get;
[tex]v_h[/tex]² = 1.3² = 2.42212² - 2 × 9.8 × h
∴ h = (2.42212² - 1.3²)/(2 × 9.8) ≈ 0.213
The height of the part where the pinball is located on the machine above the ground, h ≈ 0.213 m
Newton's Laws
Bode made a rocket using an empty plastic bottle and fins made out of cardboard. After partially filling the bottle with water, he
pumps air into the bottle using a pump attached to the rocket with plastic tubes. When the pressure in the bottle becomes high
enough the water gushes out and launches the rocket into the air, as shown in the diagram below.
Rocket
Pressurized Air
Water
Pump
-Launch Tube
Image modified courtesy of NASA
How does the force that causes the water to leave the rocket compare to the force that causes the rocket to launch?
They are ental
Answer:They are equal and act in opposite directions.
Explanation:Newton's third law of motion states that for every action there is an equal and opposite reaction. In the case of Bode's rocket, the pressurized air in the bottle forces the water to gush downward out of the bottle, causing the rocket to launch upward into the air. The force of the water gushing downward is equal to the upward force on the rocket. So, the two forces are equal and act in opposite directions.
The force that causes the water to leave the rocket compared to the force that causes the force to launch is equal but opposite in direction.
What is Newton's law?There is a threes law given by the scientist newton in relation to the motion. The first law tells that if a body is in stop mode, then they become in motion once an external force is applied to them. The second law tells that force is equal to the product of mass and acceleration of the body. The third law tells that if you apply force to an object, then the object also applies force in reaction.
According to Newton's third law, the rocket applies force to the water, then the water also exerts a force on the rocket.
In the instance of Bode's rocket, the bottle's pressured air causes the water to pour out of the bottle downward, which causes the rocket to shoot upward into the air. The upward force on the rocket is equivalent to the force of the water pouring down. Therefore, the two forces are equivalent and exert opposing forces.
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I need help on this question !
Answer:
A. Create habitats for coral, but not fish
what physical properties dose plutonium
Answer:
Explanation:
Plutonium-239 is one of the two fissile materials used for the production of nuclear weapons and in some nuclear reactors as a source of energy. The other fissile material is uranium-235. Plutonium-239 is virtually nonexistent in nature. It is made by bombarding uranium-238 with neutrons in a nuclear reactor. Uranium-238 is present in quantity in most reactor fuel; hence plutonium-239 is continuously made in these reactors. Since plutonium-239 can itself be split by neutrons to release energy, plutonium-239 provides a portion of the energy generation in a nuclear reactor.
Why do we need to take care of the surface water/groundwater?
Answer:
sghskm
rohit zimheisbwhx
the relationship between force and acceleration verification of Newton second law of motion
Answer:
below
Explanation:
According to Newtons Second Law of Motion, also known as the Law of Force and Acceleration, a force upon an object causes it to accelerate according to the formula net force = mass x acceleration. So the acceleration of the object is directly proportional to the force and inversely proportional to the mass.
4. Where would a tsunami be most likely to occur?
a. Cuba
coast of Ireland
b. New York City
d. Indonesia
Answer:
D. Indonesia
Explanation:
Indonesia's high frequency of tsunamis, due to its location along the Pacific Ring if Fire
So this is physics any suggestions?
Answer:
8. GPE
9. KE
Explanation:
GPE=mgh
KE=(1/2)mv^2
A farmer lifts a bale of hay to a hayloft that is 11m off the ground . If he uses a force of 280 N , how much work does the farmer do ?
Answer:
3,080 J
Explanation:
280 x 11 =3,080 J
What are two characteristics of transverse waves that are not found in longitudinal waves
Answer:
I don't know I'm sorry I will tell you another answer asks me to
What's a real-life example of Newton's Second Law?
Which will reduce the possible environmental damage associated with mining uranium?
installing newer water recycling systems in older power plants
increasing the reprocessing of used fuel for reuse
building additional fission nuclear power plants
developing better places to store radioactive wastes
Answer:
Answer is the last option, d
Explanation:
edge 2021
KE=0.5.m.v2 or PE=m.g.h
kinetic and potential energy practice problems solve and show your work
1. When a golf ball is hit, it travels at 41 meters per second. The mass of a golf ball is 0.045 kg. What is the kinetic energy of the golf ball?
2. the newly developed F-22 Raptor jet fighter weighs approximately 100,000kg and can travel up to 600 meters per second what is the kinetic energy of the F-22 jet fighter at this speed
3. if the jet fighter in #2 is traveling at a height of 10,000 meters, what would the potential energy be
(1) The kinetic energy of the golf ball is 37.82 Joules,
(2) The kinetic energy of the F-22 jet fighter is 1.8 × 10¹⁰ Joules.
(3) The potential energy of the F-22 jet fighter is 9.8 × 10⁹ Joules .
What is kinetic energy?Kinetic energy is a type of power that a moving object or particle possesses. When an object undergoes work, which involves the transfer of energy, by exerting a net force, the object accelerates and consequently obtains kinetic energy.
Given:
The velocity of the ball, v = 41 m / s,
The mass of the golf ball, m = 0.045 kg,
(1) Calculate the kinetic energy as shown below,
KE = 1 / 2 × 0.045 × 41²
KE = 37.82 Joules
(2) Calculate the kinetic energy of the F-22 jet fighter as shown below,
KE = 1 / 2 × 600² × 100000
KE = 1.8 × 10¹⁰ Joules
(3) Calculate the potential energy of the jet as shown below,
PE = 100000 × 9.8 × 10000
PE = 9.8 × 10⁹ Joules
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SOMEONE PLEASE HELP ME
The average kinetic energy of the particles of two pieces of iron at the same temperature and mass would be __________.
Question 1 options:
Different
The same
Not equivilent
With in 500 degrees of eachother
Answer:
The same.
Explanation:
Temperature is a measure of the average kinetic energy of a substance; if two pieces of iron have the same temperature, then their particles will have the same amount of average kinetic energy.
Answer 1 - The average kinetic energy of the particles of two pieces of iron at the same temperature and mass would be the same
Answer 2 - The particles of an object move FASTER when the temperature increases
Answer 3 - When a tight fitting lid is run under hot water, the lid
E/X/P/A/N/D/S as the temperature increases.
Answer 4 - I dont know sorry!
Answer 5 - What happens when something reaches absolute zero?
The p a r t i c l e s completely stop moving
A material that does not conduct heat very well
A
Expander
B
Radiation
C
Conductor
D
Insulator
Answer:
D
Explanation:
Insulator is like rubber, it cant physically hold heat well
What type of force causes the motion of an object to change
Answer:
Ok, so...... Unbalanced forces cause a change in motion, speed, and/or direction. When two forces act in the same direction on an object, the net force is equal to the sum of the two forces. In the example below, the net force would be 900 Newtons (450 + 450 = 900), and the object would move to the right.
Explanation:
Answer:
Unbalanced forces cause a change in motion, speed, and/or direction. When two forces act in the same direction on an object, the net force is equal to the sum of the two forces.
A(n) ________________________ is a substance that slows down a chemical reaction.
endergonic
exergonic
exothermic
inhibitor
endothermic
Answer:
inhibitor
Explanation:
Inhibitors slow down chemical reactions. Inhibitors slow down or stop the activity of an enzyme.
What phase of matter are the particles least energetic, most dense, and best organized?
A. Plasma
B. Gas
C. Liquid
D. Solid
An automobile of mass 1.46 E3 kg rounds a curve of radius 25.0 m with a velocity of 15.0 m/s. The
centripetal force exerted on the automobile while rounding the curve is:
Answer:
Centripetal force = 13140 Newton.
Explanation:
Given the following data;
Mass = 1.46 E3 kg = 1.46*10³ = 1460 kg
Velocity = 15m/s
Radius, r = 25m
To find the centripetal force, we would use the following formula:
Centripetal force = mv²/r
Substituting into the equation, we have;
Centripetal force = (1460*15²)/25
Centripetal force = (1460 * 225)/25
Centripetal force = 328500/25
Centripetal force = 13140 Newton.