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3.3 | Energy

Total questions: 12

Worksheet time: 8mins

Name
Class
Date
1.

"The ability to do work" is another name for:

a)

energy

b)

momentum

c)

impulse

d)

power

2.

Which of the following is NOT a type of potential energy?

a)

gravitational

b)

chemical

c)

thermal

d)

elastic

3.

Which of the following is not a type of kinetic energy?

a)

Electricity

b)

Heat

c)

Sound

d)

Chemical bonds

4.

Which of the following does not involve elastic potential energy?

a)

Dribbling a basketball.

b)

Jumping on a trampoline.

c)

"Shooting" a rubber band.

d)

Throwing a water balloon.

5.

The energy an object has due to its height above a surface is its potential energy.

a)

True

b)

False

6.

Total mechanical energy is the total amount of potential energy and kinetic energy an object has because of the work done on it.

a)

True

b)

False

7.

True or false: Potential energy is a scalar quantity, but kinetic energy is a vector.

a)

True

b)

False

8.

True or false: most of the energy we use started off as sunlight that has been changed into different forms.

a)

True

b)

False

9.

Given  PE = mghPE\ =\ m\cdot g\cdot h  and  g=9.8 ms2g=9.8\ \frac{m}{s^2}  :

What is the potential energy of a 3.2 kg book on a shelf 1.6 m high?

a)

50.2 J

b)

14.6 J

c)

Since it is on the shelf, it has no PE.

d)

5.1 J

10.

Given KE=12mv2KE=\frac{1}{2}m\cdot v^2 :

What is the kinetic energy of a 4.7 kg skateboard moving at 2.2 m/s?

a)

11.4 J

b)

22.8 J

c)

5.2 J

d)

10.3 J

11.

Given KE=12mv2KE=\frac{1}{2}m\cdot v^2 :

If a 6.0 kg bowling ball is moving down the lane with a kinetic energy of 18.75 J, what is its speed?

a)

6.2 m/s

b)

2.5 m/s

c)

5.0 m/s

d)

7.5 m/s

12.

A 3.7 kg object is falling with a total mechanical energy of 130 J. If its kinetic energy is currently 47 J, what is its potential energy? Use the equation

 TME = PE + KETME\ =\ PE\ +\ KE  

a)

83 J

b)

177 J

c)

-47 J

d)

6110 J