A mass is moving 5 m/s with speed of along the x-direction on a smooth surface, when a force of 5 N acts on it along they-axis. The work done by against the force isA.
Question
A mass is moving 5 m/s with speed of along the x-direction on a smooth surface, when a force of 5 N acts on it along they-axis. The work done by against the force isA.
Solution
To find the work done by the force against the motion, we need to calculate the dot product of the force and the displacement.
Given that the mass is moving with a speed of 5 m/s along the x-direction, we can assume that the displacement is also along the x-direction.
Since the force is acting along the y-axis, it is perpendicular to the displacement. Therefore, the dot product of the force and the displacement is zero.
Hence, the work done by the force against the motion is zero.
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