Question

1. A 0.01kg bullet is fired through a board 10.0 cm thick in such a way that the bullets line of motion is perpendicular to the face of the board. If the Board is 1kg and initially at rest and the initial speed of the bullet is 400m/s and it emerges from the other side of the board with a speed of 300m/s.

(a) What is the velocity of the board when the bullet emerges from it? (i)1.50m/s (ii)2.00m/s (iii)1.00m/s (iv)non of the above

(b) During collision the net work done on the bullet and the net work done on the board respectively is: (i)+350J and -1.00J (ii)-3.50×103J and -2.00J (iii)-350J and 1.00J (iv)non of the above

Answer 1