question_answer 29)

A hammer of mass 500 g, moving at 50 m s-1, strikes a nail. The nail stops the hammer in a very short time of 0.01 s. What is the force of the nail on the hammer?  

Answer:

The force of nail on the hammer,                                                Minus sign denotes the force of nail on the hammer, is acting in the direction, opposite to that of hammer.