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if the body of mass 2kg moving with a velocity 4m/s after sometime velocity becomes 8m/s change in momentum is given by |
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Answer» THE FORCE REQUIRED BY A BODY IS 4N Explanation: Mass (m) = 2kg (Given) Initial VELOCITY (U) = 4m/s (Given) If there is no change in velocity then u = v , then mv - mv = 0, whereas when there is a change - Using first equation of motion - a = v-u/t = 0-4/2 = -4/2 = -2 Force required to keep the body in same velocity is F = m x a Change in velocity means acceleration - F = m x a F = 2 x 2 F = 4 N Thus, according to Newton's first law of motion the body will continue to be straight motion or in a state of rest until an external force is applied on it , in this case a force of 4n is required to keep body MOVING with same velocity. ..I HOPE IT HELPS YOU.. FOLLOW ME..VOTE ME..GIVE HEART |
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