WorksheetsMomentum, Impulse, Work, Power, Efficiency
Total questions: 10
Worksheet time: 50mins
Name
Class
Date
1.
A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?
a)
25 m/s
b)
375 m/s
c)
25 kg m/s
d)
375 kg m/s
2.
A runner has a momentum of 670 kg m/s and is traveling at a velocity of 9 m/s. What is his mass?
a)
6030 kg
b)
0.0134 kg
c)
74.4 kg
d)
80 kg
3.
Force is a _____ or _______
a)
simple complex
b)
push pull
c)
up down
d)
in out
4.
The unit used to measure work is the
a)
Watt
b)
Newton
c)
Joule
d)
meter
5.
Which situation is work not done?
a)
lifting a 20 pound box off the floor
b)
holding a 20 pound box above the floor
c)
sliding a 20 pound box across the floor
d)
sliding a 20 pound box up an inclined plane
6.
Calculate the work done by a 47 N force pushing a pencil 0.26 m.
a)
12.2
b)
13.5
c)
12.8
d)
11.2
7.
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
8.
How can the impact force experienced during a car accident be reduced?
a)
By increasing the mass of the vehicle.
b)
By decreasing the time of duration of the impact.
c)
By increasing the time of duration of the impact.
d)
By increasing the change in velocity of the vehicle.
9.
Which of the following is a measure of the ability to turn the work done into something useful?
a)
Power
b)
Work
c)
Momentum
d)
Efficiency
10.
What is the efficiency of an object that has 4000 J of work put into it, but only produces 3000 J of useful work.
a)
75%
b)
125 %
c)
25 %
d)
None of these.
100 %
