First slide

Work done by Diff type of forces

Question

A man weighing 80 kg climbs a staircase carrying a 20 kg load. The staircase has 40 steps each of 25 cm height. If he takes 20 seconds to climb, the work done is…..joule

Moderate

A

9800
B

490
C

98 $\times 10^{5}$
D

7840

Solution

work done w= mgh = (80+20) $\times$ 9.8 $\times$ 40 $\times$ 0.25= 9800 joule

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