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WorksheetsChapter 7.1 Work, Energy and power by Aaliyah & Yunqi 3P11/2025
Total questions: 13
Worksheet time: 9mins
What is the S.I unit for work?
Force (F)
Newton (N)
Joule(J)
Watt(W)
What is the formula for work?
Work=FxS
Work= TW
Work= 21Fx
Work=mgh
Work,W, is defined as the product of ______ and _______
power, force
displacement, power
force, displacement
energy, power
State the factors affecting work.
(a)
Power is the rate of doing _____ or time for doing____.
(a)
Magnitude of force: 3N
Displacement: 0.4m
Calculate the work done.
1.7J
3.1J
1.2J
1.4J
What is the formula for power(W)?
Power= 21mv2
Power= mgh
Power= 21Fx
Power= TW
State the factors affecting power.
(a)
A force of 30N is used to push a box for a distance of 5m.
Calculate the work done.
155J
405J
150 J
200J
Pulling a drawer over a distance of 30 cm with a force of 3 N.
Force, F = 3 N Displacement = 30 cm = 0.3 m
0.8J
0.9 J
0.95
0.75
Pushing a trolley over a distance of 10 m with a force of 20 N.
Force, F = 20 N Displacement = 10 m
(a)
A worker had done 150 J of work in 5 s. Calculate the power he generated.
(a)
When is no work done on an object, even if a force is applied?
pushing against a wall
pushing a trolly
pushing a box
