A man carrying a bag of mass 25 kg climbs up to a height of 10 m in 50 seconds. Calculate the power delivered by him on the bag.
Answers
Answer
49 watts
Mass of the bag = 25 kg : Height 'h' = 10 m
Mass of the bag = 25 kg : Height 'h' = 10 mAcceleration due to gravity g = 9.8 m/s2
Mass of the bag = 25 kg : Height 'h' = 10 mAcceleration due to gravity g = 9.8 m/s2The P.E. of the man = mgh =25 × 9.8 × 10 = 2450 J
Mass of the bag = 25 kg : Height 'h' = 10 mAcceleration due to gravity g = 9.8 m/s2The P.E. of the man = mgh =25 × 9.8 × 10 = 2450 JThe work done by the man is equal to the P.E. posssessed by the man.
Mass of the bag = 25 kg : Height 'h' = 10 mAcceleration due to gravity g = 9.8 m/s2The P.E. of the man = mgh =25 × 9.8 × 10 = 2450 JThe work done by the man is equal to the P.E. posssessed by the man.∴ The work done by the man (W) = 2450 J , Time (t) = 50 sec.
Mass of the bag = 25 kg : Height 'h' = 10 mAcceleration due to gravity g = 9.8 m/s2The P.E. of the man = mgh =25 × 9.8 × 10 = 2450 JThe work done by the man is equal to the P.E. posssessed by the man.∴ The work done by the man (W) = 2450 J , Time (t) = 50 sec.∴ Power delivered by the man on the bag =Wt=2450J50sec=49 watts