The gure below shows a bullet of mass 120 g traveling horizontally towards the east with speed 450 mls, which strikes a block of mass 3.5 kg that is initially at rest on a frictionless table. After striking the block, the bullet is embedded in the block and the block and the bullet move together as one unit. a. What is the speed of the blocki'bullet combination immediately after the impact? Hints The speed of the combination is :] mls. b. What is the magnitude and direction of the impulse by the block on the bullet? Hints The block exerts an impulse of :] Ns on the bullet . c. What is the magnitude and direction of the impulse from the bullet on the block? The bullet exerts an impulse of :] Ncs on the block . d. If it took 2 ms for the bullet to change the speed from 450 m/s to the final speed after impact, what is the average force between the block and the bullet during this time? I Hints I The magnitude of the average force is :] N. e. 0f the kinetic energy initially present in the bullet, what percentage still remains as kinetic energy of the block! bullet? Hints 0f the original kinetic energy, :]% remains as kinetic energy of the block! bullet