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Unit 2.2: Analyzing Energy in Systems - Part 2

Total questions: 20

Worksheet time: 15mins

Name
Class
Date
1.
A 60.0 kg person walks from the ground to the roof of a 74.8 m tall building. How much gravitational potential energy does she have at the top of the building?
a)
43982.4 J
b)
63982.3 J
c)
43962.4 J
d)
83942.4 J
2.
A pitcher throws a 0.145 kg baseball at a velocity of 30.0m/s. How much kinetic energy does the ball have?
a)
65.35 J
b)
87.25 J
c)
23.45 J
d)
65.25 J
3.

Where would this baseball have the least amount of kinetic energy?

a)

W

b)

X

c)

Y

d)

Z

4.

The coaster at B is at -

a)

Maximum PE, Minimum KE

b)

Minimum PE, Minimum KE

c)

Minimum PE, Maximum KE

d)

Maximum PE, Maximum KE

5.

What is the GPE at point A

a)

14 J

b)

12 J

c)

6 J

d)

8 J

6.

What is the KE at point D?

a)

14 J

b)

12 J

c)

6 J

d)

8 J

7.

What is the Total Energy of the system?

a)

14 J

b)

12 J

c)

6 J

d)

8 J

8.

What is the Kinetic Energy at point B?

a)

500,000 J

b)

400,000 J

c)

300,000 J

d)

50,000 J

9.

What is the Total Mechanical Energy at point A?

a)

500,000 J

b)

400,000 J

c)

200,000 J

d)

50,000 J

10.

What is the GPE at point E?

a)

500,000 J

b)

250,000 J

c)

300,000 J

d)

100,000 J

11.

What is the Total Energy at the top?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

12.

What is the KE 1/4th of the way down?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

13.

What is the KE 3/4th of the way down?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

14.

What is the GPE at the top?

a)

50 J

b)

25 J

c)

0 J

d)

100 J

15.

What is the KE half way down?

a)

50 J

b)

25 J

c)

0 J

d)

100 J

16.

What is the Total Energy at the bottom?

a)

50 J

b)

25 J

c)

0 J

d)

100 J

17.

In every energy transformation, some energy is always “lost” as ____ energy.

a)

Chemical

b)

Radiant

c)

Electrical

d)

Thermal

18.

According to the law of conservation of energy, the total amount of energy in the universe ____.

a)

remains constant

b)

changes constantly

c)

increases

d)

decreases

19.

Which equation is correct?

a)

mechanical energy = kinetic energy – potential energy

b)

mechanical energy = potential energy – kinetic energy

c)

mechanical energy = kinetic energy + potential energy

d)

mechanical energy = kinetic energy × potential energy

20.

When two surfaces interact, some mechanical energy leaves the system as thermal energy due to ________.

a)

surrounding heat

b)

water

c)

friction

d)

fusion