Recent content by nach

OHH..i think i understand...thanks alot!

Since there was no PE before collision,so part of KE gets converted in PE in the collision.This same PE is released after the collision ,but how can it increase the KE ?

Even if potential energy was released, how can it be that the RESULTANT speed after the collision is greater than that before??becuase they are moving at 1m/s initially and after the collision the speed is 2m/s...

More thought on this question... Does it mean that potential energy is released whenever there is head on collision and the two bodies travel in opposite direction?

But momentum is always conserverd in a collision.Does it mean option d) If there was no friction... is correct? how to say there is no friction between cart and surface,

Two carts having the same mass travel towards each other, each with a speed of 1m/s relative to teh surface. The carts collide head on and are reported to rebound after teh collision, each with a speed of 2m/s relative to teh surface. Which of the following assesments of this report is correct...