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TeaWay
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Momentum..initial & final & impulse.
a 70g tennis ball coming towards you at 25 m/s is hit with a tennis racquet and goes away from u at 30 m/s
A) what is the initial momentum of the tennis ball?
B) what is the final momentum of the ball ?
C) what is the change in momentum of the tennis ball ?
D) what was the impulse on a tennis ball
E) what was the average force applied by the raquet on the ball if it made contact with the ball for 0.020 seconds ?
a) initial momentum = 0.070kg x 25 m/s
=1.75 kg x m/s
b)final momentum = 0.070kg x 30 m/s
=2.1 kg x m/s
c) change in momentum = 2.1 kg x m/s - 1.75 kg x m/s
= 0.35 kg x m/s
d) impulse = F(change in time) = change in momentum
impulse = 0.35 kg x m/s
i don't know if i did it right but i got stuck on "E"
A) what is the initial momentum of the tennis ball?
B) what is the final momentum of the ball ?
C) what is the change in momentum of the tennis ball ?
D) what was the impulse on a tennis ball
E) what was the average force applied by the raquet on the ball if it made contact with the ball for 0.020 seconds ?
a) initial momentum = 0.070kg x 25 m/s
=1.75 kg x m/s
b)final momentum = 0.070kg x 30 m/s
=2.1 kg x m/s
c) change in momentum = 2.1 kg x m/s - 1.75 kg x m/s
= 0.35 kg x m/s
d) impulse = F(change in time) = change in momentum
impulse = 0.35 kg x m/s
i don't know if i did it right but i got stuck on "E"
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