question_answer

  A bullet of mass 4 g when fired with a velocity of 50 ms -1, can enter a wall up to a depth of 10 cm. How much will be the average resistances offered by the wall?

Answer:

                  The hindrance offered by the wall to the motion of bullet is called the resistance offered by wall. Mass of the bullet, Initial velocity, Depth,        Final velocity, v = 0, Force,         F= ?                                                      (1) or               (1) Force, Thus, the average resistance offered = 50 N Negative sign indicates that the force is acting opposite to the motion.                              (1)