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what impulse is needed to slow a 45kg object from 15m/s to 12m/s please show who to work problem

Sagot :

AL2006
'Impulse' is a change in momentum.
Momentum = (mass) x (velocity)

Final momentum = (45 x12) = 540 kilogram-meters/second
Original momentum = (45 x 15) = 675 kg-m/sec
Change in momentum = -135 kg-m/sec

The impulse required is 135 kg-m/sec in the direction
opposite to the way the object is moving.
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