Dale (m = 75 kg) skis across a horizontal surface at a velocity of 5 m/s to the west. He drags his ski poles, which gives him an impulse of 300 kg.m/s to the east then his new velocity would be 1 m/s toward the west.
What is impulse?
The product of the average applied force and the time for which it is exerted is known as an impulse. The unit for the impulse of force is the same as that of momentum which is kg*m/s
The mathematical relation for impulse is
Impulse = F * Δt =change in momentum
Where F represents the force applied and Δt represents the time for which the force is applied.
As we know from the above relation the change in momentum of an object is equal to the impulse of the force
As per the given problem Dale (m = 75 kg) skis across a horizontal surface at a velocity of 5 m/s to the west when he drags his ski
poles, which gives him an impulse of 300 kg.m/s to the east there is the change of momentum of the dale due to the effect of the impulse
Impulse = change in the momentum
300 kg.m/s = 75(V- (-5))
For direction, the east is taken as positive and the west is taken as negative
V = -1 m/s
His new velocity would be 1 m/s towards the west.
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