Verizon LTE 21:14 session.masteringphysics.com , Home Work 3 Problem 364 At serv

Question

Verizon LTE 21:14 session.masteringphysics.com , Home Work 3 Problem 364 At serve, a tennis player aims to hit the ball horizontaly -Part A What minimum speed is required for the bal to clear the 0.90-m-high net about 15.0 m from the server if the ball is aunched" from a height of h = 2.70 m ? Express your answer to three significant figures and include the appropriate units. Value Units Request Answer Part B Where will the ball land relative to the player if it just clears the net? Express your answer to three significant figures and include the appropriate units. Value Units Part C Will it be "good" in the sense that it lands within 7.0 m of the net? Part D How long will it be in the air?

Explanation / Answer

Part A

Initial vertical velocity=0

Height travelled=2.7-0.9=1.8m

We got

1.8=4.9*t^2

We got t=0.606

Velocity=15/t=24.75 m/s

Part B

Time taken to travel 2.7 m =sqrt(2.7/4.9)=0.742 s

Distance travelled=18.37 m

Part C

Yes,it will be good

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