Q16 of 21 Page 109

An object with a mass 10kg moves at constant velocity of 10ms–1. A constant force then acts for 4 s on the object and gives it a speed of 2 ms–1 in opposite direction. What is the acceleration produced?

Mass of the object = m = 10 kg

Initial velocity of the object = u = 10 ms–1


Final velocity of the object = v = –2 ms–1


(Negative sign due to the opposite direction)


Time for which force acts = t = 4 s





Hence, acceleration produced =


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