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How much work is done when you lift an apple (which weighs 2N) 3 meters off the ground?

What is energy?

A

Energy is a push.

B

Energy is the ability to do work.

C

Energy is the ability to attract objects.

D

Energy is a pull.

What is the equation to calculate work?

A

W = d/F

B

W = Pt

C

W = Fd

D

W = F/d

What is the unit of work and energy?

A

Watt

B

meter

C

Newton

D

joule

A force of 25N is used to push a box along the floor a distance of 5 meters. How much work was done?

A

125J

B

135J

C

145J

D

155J

It took 100J to push a chair 4 meters across the floor. What was the force used to push the chair?

A

15N

B

25N

C

15J

D

25J

A force of 50N was used to lift a rock. A total of 160J of work was done. How far was the rock lifted?

A

1.8m

B

2.3m

C

3.2m

D

4.1m

Mr. Nicholson pushed on a box with a force of 10,000N, but he was unable to move it. How much work was done?

A

0J

B

5,000J

C

10,000J

D

20,000J

Calculate the weight of a box that is 55 kilograms.

A

240N

B

385N

C

420N

D

539M

An object accelerates at 5.0 m/s/s and it has a mass of 4.0 kilograms when an unknown force is applied to it.

What is the amount of the force?

What is the amount of the force?

A

5N

B

15N

C

20N

D

25N

An object accelerates at 10 m/s/s when a force of 20N is applied to it.

What is the mass of the object?

What is the mass of the object?

A

1kg

B

2kg

C

3kg

D

4kg

An object with a mass of 10kg has a force of 2N applied to it.

What is the acceleration of the object?

What is the acceleration of the object?

A

0.1 m/s/s

B

0.2 m/s/s

C

0.3 m/s/s

D

0.4 m/s/s

What is the power of a microwave oven if it can perform 4,000J of work in 10 seconds?

A

400W

B

500W

C

600W

D

700W

A box weighs 100N. It is lifted 4 meters in 20 seconds.

How much power is used?

How much power is used?

A

10W

B

15W

C

20W

D

25W

What is the power output of a person that pushes a box 7 meters in 5 seconds with a force of 10N?

A

8W

B

10W

C

12W

D

14W

How much work is done using a 250W blender for 2 minutes?

A

15,000J

B

25,000J

C

30,000J

D

35,000J

A machine uses 150W of power to move a box 20m in 20s. Find the force needed and the work done by the machine and the mass of the box.

0