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WorksheetsUnit 4 Review
Total questions: 39
Worksheet time: 37mins
Name
Class
Date
1.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
2.
The unit used to measure work is the
a)
Watt
b)
Newton
c)
Joule
d)
meter
3.
Which of the following is the best example of work being done.
a)
doing homework
b)
lifting a box
c)
pushing a stationary box
d)
holding a box
4.
A 5000N block is lifted 10 m. How much work was done?
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J
5.
What is the unit for mass?
a)
Kilogram (Kg)
b)
Newton (N)
c)
Joule (J)
d)
Watt (W)
6.
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
7.
The amount of work done in a certain amount of time is known as
a)
work
b)
effort force
c)
resistance force
d)
power
8.
The more POWER you use to move an object, the more work you do.
a)
True
b)
False
9.
What is the equation for power?
a)
P = Work/time
b)
P = Force/time
c)
P = time/distance
d)
P = Work * time
10.
You push against the back of your friends car that is stuck. You push and be become very tired. Did you do work?
a)
Yes, work was done
b)
No, work wasn't done
11.
Another SI unit for a joule is
a)
m/sec
b)
N-m
c)
meter
12.
Force is measured using which type of unit?
a)
Meters
b)
Kilograms
c)
Newtons
d)
Joules
13.
Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever?
a)
1
b)
10
c)
100
d)
1000
14.
What is resistance (output) force?
a)
the force required by a machine in order to accomplish work (the force you put on the machine)
b)
the force which an effort force must overcome in order to do work on an object via a simple machine.
c)
the force the machine exerts on a object
d)
the output work times the input distance
15.
Jeff is a landscaping contractor and lifts a rock weighing 600 pounds by wedging a board under the rock. Jeff weighs 150 pounds and puts all of his weight on the lever. How much mechanical advantage did the lever provide to Jeff in lifting the rock?
a)
0
b)
2
c)
4
d)
8
16.
The units for Mechanical Advantage are called
a)
Joules
b)
Watts
c)
newtons
d)
Mechanical Advantage is a ratio so it does not have units
17.
Energy stored because of gravity could be called:
a)
Potential Energy
b)
Kinetic Energy
c)
Mechanical Advantage
d)
Simple Machine
18.
Which point has the greatest potential energy (GPE)?
a)
A
b)
G
c)
D
d)
C
19.
How could you change the mass of an object DECREASE GPE (gravitational potential energy)?
a)
Decrease the object's mass
b)
Increase the object's height
c)
Increase the object's mass
d)
Decrease the object's height
20.
____________ is the ability to cause change.
a)
Energy
b)
Force
c)
Friction
d)
Motion
21.
Gravitational potential energy depends on the ________ and ________ of the object.
a)
Height and mass
b)
Friction and movement
c)
Mass and Movement
d)
Height and Friction
22.
You throw a ball into the air as shown in the diagram. At what point does the ball have the most potential energy?
a)
W
b)
X
c)
Y
d)
Z
23.
At which position does the child on the swing have the most gravitational potential energy?
a)
W
b)
X
c)
Y
d)
Z
24.
Roger Federer’s tennis ball has a mass of 0.3 kg. If he holds the ball above the ground at a height of 2.0 m to serve, what is its gravitational potential energy (GPE)?
a)
5.88 J
b)
0.6 J
c)
6.67 J
d)
0.15 J
25.
A leopard with a mass of 55.00 kg climbs 12.0 m up a tree. What is its GPE?
a)
6,468 J
b)
660 J
c)
4.58 J
d)
0.22 J
26.
With all of his Batgear on, Batman has a mass of 90.7 kg. How much potential energy does he have if he's perched on top of a 1,575 m building?
a)
142,852.5 J
b)
1,399,954.5 J
c)
0.058 J
d)
17.36 J
27.
How much KE does a moving 6 kilogram object have if it moves with a velocity of 3 m/s?
a)
27 J
b)
18 J
c)
9 J
d)
2 J
28.
The Law of Conservation of Energy states that
a)
energy cannot be created nor destroyed, only transformed or transferred
b)
energy can be destroyed but not created
c)
energy can be created but not destroyed
29.
A rabbit of mass 3kg walks at a speed of 0.5m/s. Calculate its kinetic energy.
a)
0.5 J
b)
0.75 J
c)
0.255 J
d)
0.375 J
30.
What kind of energy is in a moving skateboard?
a)
Potential
b)
Kinetic
c)
Both potential and kinetic energy
d)
none of the above
31.
At which point is kinetic energy greatest?
a)
W
b)
X
c)
Y
d)
Z
32.
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.
d)
leaves rolling down a hill
33.
A flat sloping surface that connects lower and higher elevations. It makes raising objects easier.
a)
wedge
b)
screw
c)
lever
d)
inclined plane
34.
A simple machine that consists a rigid bar that pivot about a fixed point
a)
lever
b)
pulley
c)
wheel and axle
d)
fulcrum
35.
The faster an object moves, the ________ kinetic energy it has.
a)
more
b)
less
c)
none of the above
d)
all of the above
36.
How much KE does a moving 6 kilogram object have if it moves with a velocity of 3 m/s?
a)
9 J
b)
18 J
c)
27 J
d)
2 J
37.
You serve a volleyball with a mass of 2 kg. The ball leaves your hand with a velocity of 30 m/s. What is the KE of the ball?
a)
900 J
b)
1800 J
c)
60 J
d)
30 J
38.
Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level.
a)
250,000 J
b)
2,450,000 J
c)
2,451,663 J
d)
248 J
39.
Ty lifts a set of 1250kg weights a vertical distance of 2m in a weight lifting contest. What Potential Energy do the weights now possess?
a)
12,789 Joules
b)
24,500 Joules
c)
4,500 Joules
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