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WorksheetsPCTI Work & Power
Total questions: 20
Worksheet time: 19mins
Name
Class
Date
1.
The product of the net force on an object and distance through which the object is moved
a)
Work
b)
Power
c)
Energy
d)
Acceleration
2.
Work is done when a weightlifter holds a barbell still above his head.
a)
True
b)
False
3.
Force is measured using which type of unit?
a)
Meters
b)
Kilograms
c)
Newtons
d)
Joules
4.
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
5.
The amount of work done divided by the time interval during which the work is done is called...
a)
Work
b)
Power
c)
Energy
d)
Force
6.
Person A is twice the weight of Person B and climb the same hill. If person A gets the top in half the time then...
a)
Person A is twice as powerful
b)
Person B is twice as powerful
c)
Person A is four times as powerful
d)
Person B is four times as powerful
7.
If a new fork lift can do the four times the amount of work in the same amount of time of an old forklift, then the new forklift is...
a)
Twice as powerful
b)
Four time as powerful
c)
Sixteen times the power
d)
of equal power of the old forklift
8.
Work requires force and _______.
a)
distance
b)
time
c)
position
9.
What is the unit for work?
a)
newton
b)
joule
c)
meters
10.
This is the SI unit for power.
a)
m/s2
b)
Joules
c)
Watts
11.
Tommy carries his piano up the stairs doing 100 Joules of work. If he did this in 10 seconds, how much power did he do?
a)
62,50 Watts
b)
1000 Watts
c)
10 Watts
12.
Johann Sebastian Bach carries his piano up the stairs doing 2500 Joules of work. If he did this in 25 seconds, how much power did he do?
a)
62,500 Watts
b)
6200 Wats
c)
100 Watts
d)
125 Watts
13.
Gravity is pulling down on Mr. Mitchell with 850 Newtons of force. If he climbs 30 meters up the cliff in 30 seconds, how much power did he show?
a)
850 Watts
b)
28.3 Watts
c)
765,000 Watts
d)
1.06 Watts
14.
Which of the following would result in an increase in power?
a)
Decrease the amount of time to do work.
b)
Increase the amount of time to do work.
c)
Decrease the distance moved.
d)
Decrease the amount of work done.
15.
A Mustang has more horsepower than your mom's minivan. What does this mean?
a)
The Mustang has a higher topspeed.
b)
The minivan has a worse gas mileage.
c)
The Mustang can do work faster.
d)
The Mustang will die.
16.
If 68 Joules were necessary to move a 4 Newton crate, how far was the crate moved?
a)
272 m
b)
17 m
c)
4.05 m
d)
272 cm
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.
A force of 50 N acts on the block at the angle shown in the diagram. The block moves a horizontal distance of 3.0 m. How much work is done by the applied force?
a)
189 J
b)
130 J
c)
487 J .
d)
0 J
19.
If you are pushing something and moving it, you are doing positive work. At the same time, friction is doing ___________
a)
positive work
b)
negative work
c)
no work
20.
A 34 kg tray is being held up while a waiter walks around the room horizontally. If the waiter travels 52 m in 20s how much power is produced?
a)
345 Watts
b)
43 Watts
c)
0 Watts
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