Two people push the car for 5 seconds with a combined net force of 60ON. Calculate the impulse provided to the car and also mention the relationship between net force and time of interaction, Momentum ?
Answers
Answer:
By rearranging the equation for impulse to solve for force F net = Δ p Δ t , F net = Δ p Δ t , you can see how increasing Δ t while Δ p stays the same will decrease Fnet.
Answer:
The effect of a force on an object depends on how long it acts, as well as how great the force is. In Example 1 in Linear Momentum and Force, a very large force acting for a short time had a great effect on the momentum of the tennis ball. A small force could cause the same change in momentum, but it would have to act for a much longer time. For example, if the ball were thrown upward, the gravitational force (which is much smaller than the tennis racquet’s force) would eventually reverse the momentum of the ball. Quantitatively, the effect we are talking about is the change in momentum Δp.
By rearranging the equation
F
net
=
Δ
p
Δ
t
, to be Δp = FnetΔt, we can see how the change in momentum equals the average net external force multiplied by the time this force acts. The quantity FnetΔt is given the name impulse. Impulse is the same as the change in momentum.