Two friends, Sam and John, each having weight of 40 kg, go for rock climbing. Sam
climbs to a height of 3 m in 10 s and John covers the same height in 12s.
a. Is the work done by Sam and John equal? Why?
b. Who has more power? Why?
c. Calculate the power of Sam and John.

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Solution

work done ( W = F x D ) by both will be equal because their weights(F) are equal and the distance travelled(D) by them are equal.....Sam has more power because he takes lesser time to execute the same work.......Power of sam = MgH/t = 117.6 W (M= 40 , g = 9.8 , H = 3 , t = 10 seconds for sam) and power of john = 98 W ( m = 40 , g = 9.8 , H = 3 , t = 12 seconds for john)

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Two friends, Sam and John, each having weight of 40 kg, go for rock climbing. Sam climbs to a height of 3 m in 10 s and John covers the same height in 12s. a. Is the work done by Sam and John equal? Why? b. Who has more power? Why? c. Calculate the power of Sam and John.

Two friends, Sam and John, each having weight of 40 kg, go for rock climbing. Sam
climbs to a height of 3 m in 10 s and John covers the same height in 12s.
a. Is the work done by Sam and John equal? Why?
b. Who has more power? Why?
c. Calculate the power of Sam and John.