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Answer :
Answer:
735 J
Explanation:
F (force) = ma = mg = 25kg × 9.81m/s² = 245.25N.
we are lifting, so the acceleration is going against Earth's gravity.
the work done to lift it up by 3 m is then
W = F×d = 245.25N×3 m = 735.75 J
the time (2 seconds) does not play a role here.
it would be needed to calculate the power needed to lift 25kg 3 m in 2 seconds :
power = W/t = 735.75/2 = 367.875 watts
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Answer:
Explanation:
Work done = force x displacement
force = mass x acceleration (due to gravity)
work done =25 * 9.8 * 3 = 735J
