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Ch. 8 Energy and Work Fundamentals

Total questions: 44

Worksheet time: 1hrs 11mins

Name
Class
Date
1.

Electricity is:

a)

Flowing electrons

b)

Still electrons

c)

Voltage x Wattage

d)

Amps x Watts

2.

Resistance is measured in:

a)

Volts

b)

Amps

c)

Ohms

d)

Watts

3.
Current is measured in:
a)
Ohms
b)
Voltage
c)
Amperes
d)
Watts
4.
What is the unit of electric power?
a)
ampere
b)
volt
c)
watt
d)
ohm
5.

What equation links voltage, current and resistance

a)

V = IR

b)

V = CR

c)

V = I/R

d)

V = R/I

e)

V = C/R

6.

A 1.5 volt battery is connected to a 10 ohm resistor. What current passes through the resistor? (Hint: think of Ohm's Law)

a)

6.7 A

b)

150 A

c)

0.15 A

d)

15 A

7.

What is the unit for work?

a)

Joules

b)

Newton

c)

Watts

8.

Which of the given pictures shows that work can not done?

a)
b)
c)
9.

What are the factors affect gravitational potential energy?

a)

Mass and Velocity

b)

Mass, Acceleration due to gravity, and Height

c)

Mass, Acceleration due to gravity and Time

10.

Which of the following statements show kinetic energy?

a)

The battery of a lit flashlight

b)

A golf ball placed at the edge of the hole

c)

A river flowing down a hill

11.

What are the factors that can affect the power?

a)

Work done and time

b)

Work done and velocity

c)

Work done and force

12.

What will be the formula if we are finding the TIME using the formula of power?

a)

Time = work donepowerTime\ =\ \frac{work\ done}{power}

b)

Time = powerwork doneTime\ =\ \frac{power}{work\ done}

c)

Time = work x powerTime\ =\ work\ x\ power

13.

Potential energy is associated with ---.

a)

speed

b)

position

c)

direction

d)

temperature

14.

Kinetic energy is associated with ---.

a)

speed

b)

position

c)

direction

d)

temperature

15.

The output force of a system

a)

horsepower

b)

load

c)

efficiency

d)

unload

16.

Energy is not lost nor destroyed, but is

a)

transported

b)

transpired

c)

transferred

d)

lost in translation

17.

How many forms of Power are there?

a)

3

b)

4

c)

5

d)

6

18.

how many forms of Energy are there?

a)

3

b)

4

c)

5

d)

6

19.

Which is the law of motion

a)

potential

b)

kinetic

c)

photogenic

20.

Food energy is measured in

(a)  

21.

Energy resources are grouped into ___________ categories.

a)

2

b)

3

c)

4

d)

5

22.
 Work done = Force x _________
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
23.
The unit used to measure work is the 
a)
Watt
b)
Newton
c)
Joule
d)
meter
24.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
25.
 Work done = Force x _________
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
26.
The unit used to measure work is the 
a)
Watt
b)
Newton
c)
Joule
d)
meter
27.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
28.
The unit used to measure power is the 
a)
Watt
b)
Newton
c)
Joule
d)
Newton*meter
29.
A 5000N block is lifted 10 m. How much work was done?
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J
30.
W=125 J
d=10 m
F=???
a)
12.5 N
b)
1250 N
c)
0.08 N
d)
135 N
31.

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

32.
P=25 watts 
W=5000 Joules 
t=???
a)
200 sec
b)
0.0005 s
c)
125000 s
d)
125 s
33.
What is work?
a)
the amount of energy 
b)
the transfer of force over a distance
c)
rate of work in a given time
d)
the change in distance in a given time
34.

What is the equation for work?

a)

W = mass x acceleration

b)

W = force x distance

c)

W = force / distance

d)

W = speed / time

35.
What is the equation for power?
a)
P = Work/time
b)
P = Force/time
c)
P = time/distance
d)
P = Work * time
36.
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
37.
What is the unit of measurement for Power?
a)
Joules
b)
Newtons
c)
Watts
d)
Meters
38.
What is energy?
a)
Force applied over a distamce
b)
How much work is done.
c)
Ability to do work
39.
If a group of workers can apply a force of 1,000 Newtons to move a crate 20 meters, what amount of work will they have accomplished?
a)
20,000 J
b)
200 J
c)
2,000 J
d)
20 J
40.
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
41.
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
42.
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
43.
How much work is produced when 350 N is used to move a car 5 m?
a)
70 J
b)
1750 J
c)
355 J
d)
175 J
44.
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

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