In loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m. (a) How much work does he do in lifting one box? (b) How much energy is transferred when one box is lifted? (c) If the man lifts 4 boxes per minute, at what is he working? (g = 10 m s -2 )

Question

Philoid · Accepted Answer

(a) Mass, m = 100N = 10 kg

Height, h = 1.5 m

Acceleration due to gravity, (g) = 10 m/s²

Work done = mgh

= 10 * 1.5 * 10 = 150J

(b) Potential energy = mgh = 10 * 1.5 * 10 = 150J

(c) Rate at which he is working = =

= 10W

In loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m.(a) How much work does he do in lifting one box?(b) How much energy is transferred when one box is lifted?(c) If the man lifts 4 boxes per minute, at what is he working? (g = 10 m s-2)

In loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m.
(a) How much work does he do in lifting one box?

(b) How much energy is transferred when one box is lifted?

(c) If the man lifts 4 boxes per minute, at what is he working? (g = 10 m s^-2)