Question
When serving, a tennis ball is almost motionless when it is slammed by the racquet. A force sensor in an experimental tennis racquet measures a force of 80 N during the impact with a 0.058 kg tennis ball. The
impact lasts for 0.04 seconds. If the ball was at rest initially, what is its speed after the impact with the racquet?
impact lasts for 0.04 seconds. If the ball was at rest initially, what is its speed after the impact with the racquet?
Answers
Elena
F•Δt=Δp=m•Δv= m(v-0)
v= F•Δt/m = 80•0.04/0.058=55.17 m/s
v= F•Δt/m = 80•0.04/0.058=55.17 m/s