 Work and Power
2 years ago
hrdedie
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Practice 10 QuestionsShow answers
• Question 1
45 seconds
Q. Which of the following is a true statement about work?
It measures how quickly an object accelerates
It measures how much effort is applied over a certain distance
It measures the change in an object's rate of speed
It measures how much time it takes to move a massive object
• Question 2
45 seconds
Q. What does one newton exerted over a distance of one meter equal?
One watt
One hertz
One volt
One joule
• Question 3
60 seconds Q. A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball?
77 J
7.7 J
0.7 J
770 J
• Question 4
60 seconds Q. A weightlifter lifts two 300 newton weights 1.5 meters off the ground. How much work has he done?
600 J
660 J
900 J
1200 J
• Question 5
45 seconds
Q. Simple machines make work easier by increasing what?
The distance over which work is done
The force needed to do work
The time required to do work
The acceleration of a massive object
• Question 6
30 seconds
Q. Which of these is a measure of force?
100 newtons
100 meters per second
100 joules
100 watts
• Question 7
45 seconds
Q. You move a 12-newton box up a 6-meter ramp. In order to find out how much power you created, what would you need to know?
The mass of the box
The slope of the ramp
The direction the box moved
How long the task took
• Question 8
60 seconds Q. You do 90 joules of work in 30 seconds. How much power have you generated?
30 watts
3 watts
120 watts
270 watts
• Question 9
60 seconds Q. You move an 8-newton weight five meters in 4 seconds. How much power have you generated?
160 watts
10 watts
6.4 watts
17 watts
• Question 10
120 seconds Q. Which of the following would produce the most power?