A drum of mass 100kg is rolled into the deck of a lorry 1.5m above the horizontal floor using a plank 4m long. Calculate the work done against gravity during the process
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Answer:
= 1500 joules
Explanation:
work done=force ×distance
W=FD
F=ma
F=100×10=1000N
d=1.5
w=1000N×1.5
w=1,500j
work done=1,500J
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