Question

5. A body of mass 2 kg moving on a horizontal surface with initial velocity of 4ms-' comes to rest after two seconds. If one wants to keep this body moving on the same surface with a velocity of 4ms-l, the force required is 1) 2 N 2) 4 N 3) O 4) 8N locandor moving with the same kinetic enerov are stopped by equal Ans:2N
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Answer 1

Answer:

acceleration is -2 m/sec2

force is m*a = 2*2= 4