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WorksheetsCHAPTER 4 Work, Power and Energy
Total questions: 25
Worksheet time: 8mins
Name
Class
Date
1.
Work done = Force x _________
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
2.
The unit used to measure work is the
a)
Watt
b)
Newton
c)
Joule
d)
meter
3.
The unit used to measure power is the
a)
Watt
b)
Newton
c)
Joule
d)
Newton*meter
4.
If 150 Joules of work is needed to move a box 10 meters, what force was used?
a)
1500 N
b)
15 N
c)
1.5 N
d)
150 N
5.
If 68 W of power is produced in 18 seconds, how much work is done?
a)
1,224 J
b)
0.264 J
c)
3.77 J
d)
12.24 J
6.
What is the equation for work?
a)
W = mass * acceleration
b)
W = force * distance
c)
W = force/distance
d)
W = speed/time
7.
What is power?
a)
transfer a force through a distance
b)
the rate of speed
c)
the rate of work being done
d)
transfer of space over time
8.
What is the equation for power?
a)
P = Work/time
b)
P = Force/time
c)
P = time/distance
d)
P = Work * time
9.
What is the unit of measurement for Power?
a)
Joules
b)
Newtons
c)
Watts
d)
Meters
10.
What is energy?
a)
Force applied over a distamce
b)
How much work is done.
c)
Ability to do work
11.
What is the definition for kinetic energy?
a)
the energy of motion (due to mass and velocity)
b)
stored energy due to position
c)
Energy at the top of a hill
12.
How much time is needed to produce 720 Joules of work if 90 watts of power is used?
a)
0.125 s
b)
8 s
c)
64800 s
d)
80 s
13.
What is the definition of power?
a)
the amount of work an object does
b)
the rate at which force is applied
c)
the amount of matter in an object
d)
the rate at which work is done
14.
A person weighing 600 N gets on an elevator. The elevator lifts the person 6 m in 10 seconds. How much power was used?
a)
360 W
b)
60 W
c)
3600 W
d)
600 W
15.
A hedgehog of mass 2kg runs at a speed of 0.5 m/s. Calculate the kinetic energy.
a)
1.25 J
b)
1.00 J
c)
0.50 J
d)
0.25 J
16.
At which point(s) on the roller coaster is the kinetic energy at its maximum?
a)
A
b)
B
c)
C
d)
D
17.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
18.
What states that energy can never be created or destroyed?
a)
law of conservation of momentum
b)
law of conservation of energy
c)
law of conservation of matter
d)
law of conservation of water
19.
How many joules of potential energy does a 5.2kg book gain when it is elevated 4m?
a)
204 J
b)
52J
c)
9.81 J
d)
48.99 J
20.
How do we express the total amount of energy a moving object has?
Where KE is Kinetic Energy and PE is Potential Energy
a)
KE x PE
b)
KE + PE
c)
KE - PE
d)
KE / PE
21.
When a rollercoaster cart moves towards the ground, what happens to the PE that it has?
a)
It transforms into KE
b)
It leaves the system
c)
Nothing
d)
It stays PE
22.
What is the formula for Gravitational Potential Energy?
a)
PE = m*g*h
b)
KE = 1/2m*v2
c)
W = F*d
d)
P = W/t
23.
What is the formula for Kinetic Energy?
a)
PE = m*g*h
b)
KE = 1/2m*v2
c)
W = F*d
d)
P = W/t
24.
which point has the most potential energy
a)
G
b)
B
c)
C
d)
F
25.
When a pendulum swings, at which point is potential energy at its greatest?
a)
1
b)
2
c)
3
d)
4
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