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Work, Simple Machines, Kinetic and Potential Energy

Total questions: 43

Worksheet time: 2hrs 42mins

Name
Class
Date
1.
The unit used to measure work is the 
a)
Watt
b)
Newton
c)
Joule
d)
meter
2.
Any device that makes work easier is called a ______________________.
a)
Joule 
b)
prop
c)
lever
d)
machine
3.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
4.
The efficiency of a machine can be increased by reducing __________________________. 
a)
effort
b)
resistance friction
c)
fulcrum
d)
friction
5.
A simple machine with a straight slanted surface is a(n) __________________. 
a)
lever
b)
wheel and axle
c)
inclined plane
d)
pulley
6.
No machine in existence has 100% efficiency due to ____________________.
a)
magic
b)
friction
c)
smoke
d)
input
7.
A drill bit is an example of which machine?
a)
screw
b)
pulley
c)
ramp
d)
wedge
8.
A 5000N block is lifted 10 m. How much work was done?
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J
9.
Force is a _____ or _______
a)
simple    complex
b)
push     pull
c)
up      down
d)
in      out
10.
In which of these cases is work being done? 
a)
A student sleeps
b)
A student pushes a locked door that does not move
c)
a student carries his chair into another room
d)
A student sits on the carpet
11.
Flagpole
a)
wedge
b)
pulley
c)
incline plane
d)
wheel and axle
12.
If you use a crowbar to get the lid off of a bucket, what simple machine are you using?
a)
Inclined Plane
b)
Pulley
c)
Wheel and Axle
d)
Lever
13.
Stairs
a)
wedge
b)
pulley
c)
inclined plane
d)
wheel and axle
14.
Lightbulb
a)
wedge
b)
pulley
c)
incline plane
d)
screw
15.

How far does a car that weighs 5,000 N go if 18,000 J of work is done on it?

a)

3.8 m

b)

3.7 m

c)

3.2 m

d)

3.6 m

16.
What is the unit for mass?
a)
Kilogram (Kg)
b)
Newton (N)
c)
Joule (J)
d)
Watt (W)
17.
How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?
a)
15 J
b)
45 J
c)
0 J
d)
5 J
18.
Two or more simple machines used together is a 
a)
compound machine 
b)
wheel and axle 
c)
block and tackle 
d)
mechanical advantage 
19.
Which is not a type of simple machine?
a)
spring
b)
screw
c)
pulley
d)
wedge
20.
The fixed point on the lever is called 
a)
load
b)
resistance
c)
bar
d)
fulcrum
21.

A cheetah can run briefly with a speed of 31.0 m/s. Suppose a cheetah with a mass of 47.0 kg runs at this speed. What is the cheetah’s kinetic energy?

a)

1457 Joules

b)

22,584 Joules

c)

15 Joules

d)

45,167Joules

22.
What would have the greatest kinetic energy?
a)
A car driving down a hill.
b)
A person running down a hill. 
c)
A ball rolling down a hill. 
23.
Which is the best example that something has kinetic energy?
a)
a. a car parked on a steep hill 
b)
b. a tennis ball rolling across the court
c)
c. a picture hanging on the wall 
d)
d. a piece of coal before it's burned 
24.

Which object has the most potential energy?

a)

A ball resting on the ground.

b)

A ball being thrown at 100 miles per hour.

c)

A ball on top of a refrigerator.

d)

A ball resting on the edge of a cliff.

25.

Four cars are positioned at the top of a hill. Which car has the most potential energy?

a)

A

b)

B

c)

C

d)

D

26.

Energy stored because of gravity is called:

a)

Gravitational Potential Energy

b)

Kinetic Energy

c)

Mechanical Advantage

d)

Chemical Energy

27.

What is the gravitational potential energy (GPE) of a 1 kilogram book that is 1 meter above the ground?

g = 9.8 m/s2

a)

9.8 Joules

b)

1.0 Joule

c)

0.10 Joule

d)

11.8 m/s2

28.

Moving a book to a lower shelf decreases its potential energy

a)

True

b)

False

29.
WHEN AN ARCHER BENDS A BOW, WHAT TYPE OF ENERGY INCREASES IN THE BOW?
a)
GRAVITATIONAL
b)
ELASTIC
c)
KINETIC
d)
THERMAL
30.
Which of these is not a source of chemical energy?
a)
Spaghetti
b)
The Sun
c)
Battery
d)
Petroleum
31.

What type of energy transformation occurs, when a hawk eats a mouse and then uses the energy from the mouse to fly?

a)

mechanical energy to chemical energy

b)

thermal energy to mechanical energy

c)

chemical energy to mechanical energy

d)

mechanical energy to thermal energy

32.

Which object shows an energy transformation from electrical to mechanical?

a)
b)
c)
d)
33.

When a car burns gasoline it creates hot air to move the pistons in the engine, which causes the car to move. What energy transformation occur from the fuel to the movement of a car?

a)

thermal energy to mechanical energy

b)

thermal energy to chemical energy to mechanical energy

c)

chemical energy to thermal energy to mechanical energy

d)

chemical energy to electrical energy

34.

A solar power plant converts _____________ to ____________.

a)

Electrical energy to solar energy

b)

radiant energy to electrical energy

c)

chemical energy to electrical energy

d)

mechanical energy to thermal energy

35.

Select all of the following that are true.

a)

Energy can be transferred and transformed.

b)

There are three types of energy.

c)

Energy just disappears sometimes.

d)

Electrical energy can be transformed into mechanical energy.

36.

What sort of energy transformation is this?

a)

Chemical to Thermal

b)

Thermal to chemical

c)

Kinetic to potential

d)

Open to closed

37.

When you compress a spring, which type of energy increases?

a)

gravitational potential energy

b)

elastic potential energy

c)

chemical potential energy

d)

radiant energy

38.
what type of energy is stored in a battery?
a)
electrical
b)
chemical
c)
thermal
d)
mechanical
39.

What is the definition of power?

a)

Power is a comparison of how much energy is used to do work versus how much is lost or wasted to the environment.

b)

Power means that you are in charge.

c)

Power is the ability to lift things up and put them down.

d)

Power is the rate at which someone, or something, uses energy.

40.

What is the unit for Power?

a)

Joules

b)

Volts

c)

Watts

d)

Amps

41.

What is the equation for power?

a)

EnergyTime\frac{Energy}{Time}  

b)

WorkEnergy\frac{Work}{Energy}  

c)

mass×gravity×heightmass\times gravity\times height  

d)

Energy×TimeEnergy\times Time  

42.

If Mr. P runs up a flight of stairs with a height of 10 meters in 5 seconds and Mr. P’s twin brother who has the same mass runs up the same flight of stairs in 4 seconds. Who has more power?

a)

Ms. Poteete

b)

Mr. P

c)

Mr. P's twin brother

d)

Ms. Millard

43.

If Mr. P’s dog Ally has a mass of 50 kg and runs up a flight of stairs with a height of 10 meters in 2 seconds and Ms. Poteete’s dog Jasper has a mass of 25 kg and runs up the same flight of stairs in the same amount of time. Which dog has more power?

a)

Jasper

b)

Ally

c)

Air Bud

d)

Scout

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