Question

What is the work done when a 10kg box is being pushed by a 50kg boy to a distance of 10m?

Answer 1

Answer:

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Answer 2

Given :

mass = m = 10kg

distance = s = 10m

To find:

Work done by the man , W ?

Solution:

• Horizontal force applied by the man on the box is given by, F= mg

$F = 10 \times 10 = 100 N (g=10m/s^2)$

Work done is given by , $W = Fscos\theta$

Taking theta here as 0 since the box is pushed horizontally and substituting the values , we get ;

$W = 100 \times 10 \times cos 0$ = 1000 Joules