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A horse continues to apply a force in order to move a cart with a constant speed. Explain why?
Answers (1)
Sol. The horse constantly applies force on the cart to maintain the speed of the cart. It seems that only force on the cart is applied by horse, so its speed must be increasing. But, as the cart is moving on the road, a friction force from the road must be acting opposite to the direction of motion. The force by horse overcome the force applied by friction. If the horse would not apply any force, the cart will slow down.
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