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    				| 1. | A 150 g tennis ball coming at a speed of 40 m/s ishit straight back by a bat to speed of 60 m/s. Themagnitude of the average force F on the ball, wherit is in contact for 5 ms with the bat is :-(1) 2500 N(2) 3000N(4) 4000 N(3) 3500 N | 
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