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splac6996
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A tennis player swings her 1000 g racket with a speed of 10.00 . She hits a 60 g tennis ball that was approaching her at a speed of 20.0 . The ball rebounds at 40.0 .
How fast is her racket moving immediately after the impact? You can ignore the interaction of the racket with her hand for the brief duration of the collision.
I used the conservation of momentum equation below
M1(Vf)1+M2(Vf)2=M1(Vi)1+M2(Vi)2
after rearranging this for Vf1 which in this case is the final speed of the racket I get 8.8m/s.
I should get 6.4m/s. Can someone please help me with this.
How fast is her racket moving immediately after the impact? You can ignore the interaction of the racket with her hand for the brief duration of the collision.
I used the conservation of momentum equation below
M1(Vf)1+M2(Vf)2=M1(Vi)1+M2(Vi)2
after rearranging this for Vf1 which in this case is the final speed of the racket I get 8.8m/s.
I should get 6.4m/s. Can someone please help me with this.
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