Week 7: Work and Energy Capabilities

Question 1 of 10

1

Work is the product of:

Select one of the following:

Force x Time
Force x Distance
Energy x Distance
Energy x Time

Explanation

Question 2 of 10

1

Fill the blank spaces to complete the text.

A woman carries a 5 kg box of clothes to donate into the shop. If she walks a horizontal distance of 10 meters from her car to the shop door, how much work has gravity done on the box?

First blank is the numerical value. The second blank is for the units.

W =

Explanation

Question 3 of 10

1

Fill the blank space to complete the text.

How much potential energy does a 1 kg textbook have if it is thrown to a height of 5 meters? (Use a value of 10 for the acceleration due to gravity)

U = J

Explanation

Question 4 of 10

1

A book is dropped and slams loudly onto a desktop. Compare the kinetic energy at the bottom to the potential at the top of its motion.

Select one of the following:

KE > U
U > KE
KE = U
Need more values

Explanation

Question 5 of 10

1

Fill the blank space to complete the text.

What is the kinetic energy of a 1000 kg car moving at 10 m/s?

KE = J

Explanation

Question 6 of 10

1

In order to life a 1 kg book to a height of 2 m, how much work must be done? Use a value of 10 for the acceleration due to gravity.

Select one of the following:

2 J
0.2 J
200 J
20 J

Explanation

Question 7 of 10

1

Fill the blank space to complete the text.

How fast is a 5 kg ball moving the instant before striking the ground after it is dropped from a height of 4 meters?

v = m/s

Explanation

Question 8 of 10

1

A boy pushes a chair with a force of 25 N. If he exerts the force for 2 meters, how much work has he done on the chair?

Select one of the following:

25 J
50 J
50 N
12.5 J

Explanation

Question 9 of 10

1

A truck driver is trying to push a 1500 kg loaded truck with an applied force of 5000 N. Unfortunately, his attempt was unsuccessful the truck stays stationary no matter how hard the driver pushes. How much work is done by the driver?

Select one of the following:

Zero
F * x
F * t
- F * x

Explanation

Question 10 of 10

1

Two heavy objects collide. Which of the following could be where their initial kinetic energies could be transferred?

Select one or more of the following:

Sound
Heat
Friction
Surface Deformation
They exactly cancel each other out
The energies pass through the other car

	Created by Ryan Elwell over 4 years ago

Work, Energy and the link between the two.

Week 7: Work and Energy Capabilities

Question 1 of 10

Work is the product of:

Select one of the following:

Explanation

Question 2 of 10

Fill the blank spaces to complete the text.

A woman carries a 5 kg box of clothes to donate into the shop. If she walks a horizontal distance of 10 meters from her car to the shop door, how much work has gravity done on the box? First blank is the numerical value. The second blank is for the units. W =

Explanation

Question 3 of 10

Fill the blank space to complete the text.

How much potential energy does a 1 kg textbook have if it is thrown to a height of 5 meters? (Use a value of 10 for the acceleration due to gravity) U = J

Explanation

Question 4 of 10

A book is dropped and slams loudly onto a desktop. Compare the kinetic energy at the bottom to the potential at the top of its motion.

Select one of the following:

Explanation

Question 5 of 10

Fill the blank space to complete the text.

What is the kinetic energy of a 1000 kg car moving at 10 m/s? KE = J

Explanation

Question 6 of 10

In order to life a 1 kg book to a height of 2 m, how much work must be done? Use a value of 10 for the acceleration due to gravity.

Select one of the following:

Explanation

Question 7 of 10

Fill the blank space to complete the text.

How fast is a 5 kg ball moving the instant before striking the ground after it is dropped from a height of 4 meters? v = m/s

Explanation

Question 8 of 10

A boy pushes a chair with a force of 25 N. If he exerts the force for 2 meters, how much work has he done on the chair?

Select one of the following:

Explanation

Question 9 of 10

A truck driver is trying to push a 1500 kg loaded truck with an applied force of 5000 N. Unfortunately, his attempt was unsuccessful the truck stays stationary no matter how hard the driver pushes. How much work is done by the driver?

Select one of the following:

Explanation

Question 10 of 10

Two heavy objects collide. Which of the following could be where their initial kinetic energies could be transferred?

Select one or more of the following:

Explanation

A woman carries a 5 kg box of clothes to donate into the shop. If she walks a horizontal distance of 10 meters from her car to the shop door, how much work has gravity done on the box?

First blank is the numerical value. The second blank is for the units.

W =

How much potential energy does a 1 kg textbook have if it is thrown to a height of 5 meters? (Use a value of 10 for the acceleration due to gravity)

U = J

What is the kinetic energy of a 1000 kg car moving at 10 m/s?

KE = J

How fast is a 5 kg ball moving the instant before striking the ground after it is dropped from a height of 4 meters?

v = m/s