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    				| 1. | A ball of mass 150 g is acted upon by a force of 250 dynes for 10 seconds. If the ball is initially at rest, then calculate the final velocity. | 
| Answer» Answer:Given that, Force F=100dyn Mass m=5g Time t=10s Initial VELOCITY u=0 Now, the acceleration is F=ma a= m F  
 a= 5×10 −3 
 100×10 −5 
  
 a=0.20m/s 2 
 Now, from EQUATION of motion v=u+at v=0+0.20×10 v=2m/s v=200cm/s Hence, the velocity produced is 200 cm/s Explanation: | |