What is the increase in potential energy of the box

Reference no: EM132241707

Assignment -

Questions - NOTE: This is a multi-part question. A compact car and a large truck have a head-on collision. During the collisions, which vehicle, if either, experiences:

Q1. the greater force of impact

A) the compact car

B) the truck

C) both experience the same force

Q2. the greater change in momentum

A) the compact car

B) the truck

C) both experience the same change in momentum

Q3. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A compact car and a large truck have a head-on collision. During the collisions, which vehicle, if either, experiences:

the greater acceleration

A) the compact car

B) the truck

C) both experience the same acceleration

Q4. A mass attached to a spring, which in turn is attached to a wall, is free to move on a friction-free horizontal surface. The mass is pulled back and then released.

At what point(s) in the motion of the mass after its release is its potential energy the greatest?

A) furthest from equilibrium

B) at equilibrium

C) in the middle of equilibrium and the furthest point

Q5. A mass attached to a spring, which in turn is attached to a wall, is free to move on a friction-free horizontal surface. The mass is pulled back and then released.

At what point(s) is the kinetic energy the greatest?

A) furthest from equilibrium

B) at equilibrium

C) in the middle of equilibrium and the furthest point

Q5. At the low point in its swing, a pendulum bob with a mass of 0.15 kg has a velocity of 14 m/s.

Find the kinetic energy of a pendulum at the low point given m and v.

What is its kinetic energy at the low point?

The kinetic energy at the low point is ____ J.

Q6. This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. At the low point in its swing, a pendulum bob with a mass of 0.15 kg has a velocity of 14 m/s.

Find kinetic energy at the high point of its swing.

What is its kinetic energy at the high point?

The kinetic energy at the high point is________ J?

Q7. At the low point in its swing, a pendulum bob with a mass of 0.15 kg has a velocity of 14 m/s.

What is its potential energy at the high point (assuming the potential energy at the low point was zero)?

The potential energy at the high point is__________ J?

Q8. At the low point in its swing, a pendulum bob with a mass of 0.15 kg has a velocity of 14 m/s.

How high will the bob swing above the low point before reversing direction? Ignore the air resistance.

The bob swings a height of _____________ M?

Q9. A force of 130 N acts on a ball for 0.45 s. The ball is initially at rest.

Determine the final momentum of the ball.

The final momentum of the ball is___________ kg ·m/s.

Q10. A box with a mass of 7 kg is lifted (without acceleration) through a height of 2.7 m, in order to place it upon the shelf of a closet. The value of acceleration due to gravity g = 9.8 m/s².

What is the increase in potential energy of the box? (You must provide an answer before moving to the next part.).

The increase in potential energy of the box is _________ J.

Q11. A box with a mass of 7 kg is lifted (without acceleration) through a height of 2.7 m, in order to place it upon the shelf of a closet. The value of acceleration due to gravity g = 9.8 m/s².

What is the work done to lift the box to this position?

The work done to lift the box is________J.

Q12. A 0.40-kg mass attached to a spring is pulled back horizontally across a table so that the potential energy of the system is increased from zero to 175 J. Ignoring friction, what is the kinetic energy of the system after the mass is released and has moved to a point where the potential energy has decreased to 110 J?

The kinetic energy of the system after the mass is released and has moved to a point where the potential energy has decreased to 110 J is ____?

Q13. A 50kg child is on a sled at the top of a 10m friction less hill. What is the child's speed at the bottom of the hill?

A) 17 m/s

B) 21 m/s

C) 10M/S

D) 14 m/s

E) 5 m/s

Q14. A pendulum swings through 10 cycles in 2 seconds. The frequency of the pendulum is

A) 10 Hz.

B) 5 Hz.

C) 2 Hz.

D) 0.5 Hz.

E) 0.1 Hz.

Reference no: EM132241707

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