they hit a glass window pane at a right angle. The interaction between both proj

Question

they hit a glass window pane at a right angle. The interaction between both projectiles and the glass pane takes time T. Projectile A bounces off of the window (in the opposite direction) with the same speed V it had at the beginning. Projectile B sticks to the window pane and stops. Describe the likely damage to the glass pane by selecting all the true statements below. Projectiles A & B have the same likelihood of breaking the glass since they have the same initial momentum Projectile A has the greater likelihood of breaking the glass since its m change is larger momentu Projectile B has the greater likelihood of breaking the glass since its final momentum is smaller Projectile A has the greater likelihood of breaking the glass since its momentum change is smaller

Explanation / Answer

Since Projectile A bounces back with same speed, there is maximum change in momentum ( 2 mV ), and as a consequence of Newton's Second Law, there will be maximum Force given to window, as compared to projectile B. for Projectile B, change in momentum is only mV

TRUE STATEMENT: Projectile A has the greater likelihood of breaking the glass since its momentum change is larger

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