What are the key steps for solving a tennis ball impulse problem?

[jacy]

hi,
I am trying to solve this problem.

A tennis ball of mass m=0.060kg and speed v= 25m/s strikes a wall at a 45 degree angle and rebounds with the same speed at 45 degree. What is the impulse given to the ball?

Do i need to break velocity into its components. Please suggest me a hint, thanks.

 

[BerryBoy]

Yes you do need to break velocity into components. If there is no friction (a sensible assuption in this case), would the rebound affect the vertical component of the velocity?

Hope this helps,
Sam

 

[amcavoy]

Once you break it into components use the impulse-momentum theorem:

$$\int\mathbf{F}\,dt=m\mathbf{v}_f-m\mathbf{v}_i$$

 

[jacy]

impulse

Yes you do need to break velocity into components. If there is no friction (a sensible assuption in this case), would the rebound affect the vertical component of the velocity?
Hope this helps,
Sam

Thanks for replying. I wish i could draw the diagram. Is there a way that i can insert the diagram. Plz let me know