# While loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m. i) How much work does he do in lifting one box? ii) How much energy is transferred when one box is lifted? iii) If the man lifts 4 boxes per minute,at what power is he working? (g=10m/s^2)â€‹

Weight of box, (W) = 100 N

Height, (h) = 1.5 m

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

(a)  Work done = (Weight of body) × (Vertical distance)= (100) × (1.5) J=150 J

(b) The work done against gravity is stored in the box in the form of potential energy. So, energy transferred when one box is lifted is 150 J

(c)

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