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10. A 50.0 g golf ball is hit off a tee.  What is the velocity obtained if the impulse was 20.0 N . s?

 

A. 2.50 m/s The change in momentum must equal the applied impulse.

Since the golf ball is on a tee, its initial velocity is 0.  /\v = vf

impulse = m vf 
   

          impulse        20.0 kg m s -1 
vf  = -------------- = -------------------- = 400. m/s
            mass           0.0500 kg

 
The Correct Answer is C.

B. 200. m/s
C. 400. m/s
D. 1.00 x 103 m/s