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Q.

If a force f is acting on a mass m and the direction of displacement is from west to east shown by the longer arrow, then the work done by the force f is  [[1]] Joules


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Detailed Solution

If a force f is acting on a mass m and the direction of displacement is from west to east shown by the longer arrow, then the work done by the force f is  zero Joules.
Work is defined as “the energy transferred to or from an object via the application of force along a displacement.” It is a product of force (F) applied in the direction of movement and displacement (s). Mathematically, Work (W) is represented as W=F scosθ
where, θ is the angle between force applied and displacement caused.
The above picture shows that the force and the displacement are perpendicular to each other. Therefore, θ=90o
        W =Fscos 90o 
cos90o=0
         W=0 J
 
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If a force f is acting on a mass m and the direction of displacement is from west to east shown by the longer arrow, then the work done by the force f is  [[1]] Joules