A truck of mass 500kg is moving with constant speed 10m/s.if sand is dropped into the truck at the rate 10kg/min,the force required to maintain the motion with constant velocity is?
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m = 500 kg u = 10 m/s
change in mass = dm/dt = 10/60 =1/6 kg/sec
change in momentum = m u = 1/6 * 10 = 5/3 kg-m/sec²
So force required = F = Δp/Δt = 5/3 N
change in mass = dm/dt = 10/60 =1/6 kg/sec
change in momentum = m u = 1/6 * 10 = 5/3 kg-m/sec²
So force required = F = Δp/Δt = 5/3 N
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