a particle of mass 120g moving at a speed of 750cm/s is is acted upon by a variable force opposite to its direction of motion the velocity of a particle becomes 250 centimetre per second along the direction of force find the value of time t for which the force is acted
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Answer:
Area of Ft graph = Impulse
= change in momentum
12(t+6)×10−2×10
=120×10−3(7.5+2.5)
∴t=18s
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