15. Force is not required to:
A. Increase the speed of Handcart
B. Decrease the speed of Handcart
C. Move the handcart with the same speed along the same direction
D. Change the direction of motion of the handcart
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Options - C
Newton's first law of motion declares that a force is not needed to keep an object in motion. In the absence of a force of friction, the book would continue in motion with the same speed and direction - forever !
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(b) Decrease the speed of handcart
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