Free Printable Module 4 Work and Energy

1.

The use of force to move an object is called

a)

energy

b)

work

c)

force

d)

power

2.

For work to be done, the _____________________ must be applied in the same direction that the object moves.

a)

energy

b)

force

c)

power

d)

distance

3.

A _________________________ is any device that makes work easier by changing a force.

a)

chemical reaction

b)

turbine

c)

machine

d)

force

4.

Machines do not increase or decrease the amount of ______________ that is done. They just change how the _______________ is done.

a)

power, power

b)

height, height

c)

distance, distance

d)

work, work

5.

Identify the type of simple machine shown.

a)

lever

b)

pulley

c)

inclined plane

d)

wedge

6.

Identify the type of simple machine shown.

a)

wheel and axle

b)

pulley

c)

lever

d)

screw

7.

Identify the type of simple machine shown.

a)

inclined plane

b)

wedge

c)

lever

d)

pulley

8.

Identify the type of simple machine shown.

a)

inclined plane

b)

wedge

c)

lever

d)

screw

9.

Identify the type of simple machine shown.

a)

wedge

b)

inclined plane

c)

screw

d)

lever

10.

Identify the type of simple machine shown.

a)

wheel and axle

b)

pulley

c)

wedge

d)

screw

11.

_____________________________ is the ratio of the output force to the input force.

a)

Mechanical advantage

b)

Efficiency

c)

Work

d)

Power

12.

Work is measured in

a)

kilograms (kg)

b)

joules (J)

c)

meters (m)

d)

Newtons (N)

13.

Weight is measured in

a)

kilograms (kg)

b)

joules (J)

c)

meters (m)

d)

Newtons (N)

14.

Mass is measured in

a)

kilograms (kg)

b)

joules (J)

c)

meters (m)

d)

Newtons (N)

15.

Distance is measured in

a)

kilograms (kg)

b)

joules (J)

c)

meters (m)

d)

Newtons (N)

16.

_____________________ is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work).

a)

Power

b)

Work

c)

Efficiency

d)

Mechanical advantage

17.

The output work is always _________________ the input work because some of the input work is used to overcome friction.

a)

less than

b)

more than

c)

equal to

18.

Actual Mechanical Advantage =

a)

$\frac{Output\ Force}{Input\ Force}$

b)

$\frac{Input\ Force}{Output\ Force}$

c)

Force x Distance

d)

$\frac{AMA}{IMA}$ x 100

19.

Ideal Mechanical Advantage =

a)

$\frac{Input\ Dis\tan ce\ }{Output\ Dis\tan ce}$

b)

$\frac{Output\ Dis\tan ce}{Input\ Dis\tan ce}$

c)

Force x Distance

d)

$\frac{AMA}{IMA}$ x 100

20.

Efficiency =

a)

$\frac{Output\ Force}{Input\ Force}$

b)

$\frac{Input\ Dis\tan ce}{Output\ Dis\tan ce}$

c)

Force x Distance

d)

$\frac{AMA}{IMA}$ x 100

21.

Work =

a)

$\frac{Output\ Force}{Input\ Force}$

b)

$\frac{Input\ Dis\tan ce}{Output\ Dis\tan ce}$

c)

Force x Distance

d)

$\frac{AMA}{IMA}$ x 100

22.

How much work is done to move a 4 N rock 10 meters? W = Fd

a)

0.4 J

b)

2.5 J

c)

40 J

d)

400 J

23.

What is the Ideal Mechanical Advantage of the pulley shown. (Count the supporting ropes.)

a)

1

b)

2

c)

3

d)

4

24.

What is the Ideal Mechanical Advantage of the pulley shown. (Count the supporting ropes.)

a)

1

b)

2

c)

3

d)

4

25.

What is the Ideal Mechanical Advantage of the pulley shown. (Count the supporting ropes.)

a)

1

b)

2

c)

3

d)

4

26.

What is the weight of a book that has a mass of 2.0 kg? W= mg

a)

2.0 N

b)

4.0 N

c)

20 N

d)

200 N

27.

If a device uses 1000 J of energy but only 200 J is used for useful work, what is the efficiency of the device?

a)

5%

b)

20%

c)

80%

d)

95%

28.

What is the efficiency of a system that requires 500 J of energy to do 250 J of useful work?

a)

25%

b)

50%

c)

75%

d)

100%

29.

Energy due to motion is ____________ energy.

a)

Potential

b)

Energy

c)

Kinetic

d)

Friction

30.

__________ is stored energy.

a)

Potential

b)

Kinetic

c)

None of the above

d)

All of the above

31.

At which point is potential energy greatest?

a)

W

b)

X

c)

Y

d)

Z

32.

At which point is kinetic energy greatest?

a)

W

b)

X

c)

Y

d)

Z

33.

A 0.40 kilogram bird is flying at a constant speed of 8.0 m/s. What is the bird's kinetic energy ?

a)

3.2 J

b)

4.2 J

c)

2.0 J

d)

12.8 J

34.

Determine the gain in gravitational potential energy when a 4.0 kg block is raised 18 m. Gravity is 9.8m/s.

PE = mgh

a)

706 J

b)

72 J

c)

7056 J

d)

176 J

Module 4 Work and Energy

Total questions: 34

Worksheet time: 22mins

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