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WorksheetsTopic 5 Review
Total questions: 10
Worksheet time: 21mins
You do 90 joules of work in 30 seconds. How much power have you generated?
30 watts
3 watts
120 watts
270 watts
A puppy 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
Which of the following shows the correct order of the energy transformations that occur when green plants produce their food from the Sun’s energy?
chemical to thermal
radiant to chemical
thermal to radiant
chemical to electrical
The roller coaster cart has the most kinetic energy at position
X
W
Y
Z
Which statement is true about the picture?
The men use the same amount of force to push the objects.
The man on the left does more work than the man on the right.
The man on the right uses less power than the man on the left.
Both men do the same amount of work, but they do not use the same amount of power.
A horse sprints 100 m in 5 seconds. How much power did it use if it weighs 7500 N?
150 W
375 W
15,000 W
150,000 W
How much work would a crane have to do to lift a 5000 N concrete block 10 meters into the air?
50 J
500 J
5,000 J
50,000 J
