A force of 45 N causes an object to move 3 m in the direction of the force. Calculate the work done.
135 J
Work done W = F × s when the displacement is along the force.
W = 45 N × 3 m = 135 J.
Hence, the answer is 135 J.
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- During energy transformation, the total energy of a system:
- An object of mass 1 kg is moving with a velocity 10 m/s. Find the kinetic energy of the object.
- The efficiency of a machine can never be ______.
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