A student lifts a 50 pound (lb) ball 4 feet (ft) in 5 seconds (s). How many joules of work has the student completed?
Answers
Answered by
42
1 pound = 454 gram = 0.454 kg
1 foot = 30 cm = 0.30 m
now,
mass (m ) = 50 pounds = 50 × 0.454 kg
height (h) = 4 x 0.3 = 1.2 m
work done =mgh
= 50 × 0.454 × 1.2 x 10 joule
= 272.4 joule
1 foot = 30 cm = 0.30 m
now,
mass (m ) = 50 pounds = 50 × 0.454 kg
height (h) = 4 x 0.3 = 1.2 m
work done =mgh
= 50 × 0.454 × 1.2 x 10 joule
= 272.4 joule
rina2112:
it's the correct answer thank you very much.......
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Answered by
4
Answer:
272.4 joule
Explanation:
hope it helps you
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