Question

17. The diagram shows a wooden block of mass 10 kg
pushed up a rough inclined plane at a constant speed
by a force of 50 N. When the block travels from X
to Y, it reaches a height of 5 m and travels a distance
of 13 m along the plane, then what is the work done
against friction?
A. 650 J
B. 600 J
C. 250 J
D. 150 J
12 m
13 m
5 m​

Answer 1

The work done against friction is 650 J.

(A) is correct option.

Explanation:

Given that,

Mass  = 10 kg

Force = 50 N

Height = 5 m

Distance = 13 m

We need to calculate the work done against friction

Using formula of work done

$W = F\cdot d$

Where, F = force

d = distance

Put the value into the formula

$W=50\times13$

$W=650\ J$

Hence, The work done against friction is 650 J.

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Topic : work done

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