This is the entire question: A 9.0 g coin moving to the right at 25.0 cm/s makes an elastic head-on collision with a 19.0 g coin that is initially at rest. After the collision, the 9.0 g coin moves to the left at 12.5 cm/s.
Find the amount of kinetic energy transferred to the 19.0 g coin.
the final velocity is 17.76 cm/s to the right
Im trying to find the Kinetic energy transferred to the 19g or .019kg coin.
Please help me, i am a very confused asian boy.
2007-11-07 13:42:57 · 1 answers · asked by Troubled 3 in Science & Mathematics ➔ Physics
I'm also very confused. One thing a perfectly elastic collision cannot do is increase the relative velocities between the two bodies, yet it has happened here (from 25 to 12.5+17.76 cm/s).
But supposing the final velocity to be true, the kinetic energy of the 19 g coin is mv^2/2 = 0.019*0.1776^2/2 J. Since it had zero KE at the start, that's the amount transferred.
2007-11-08 12:02:05 · answer #1 · answered by kirchwey 7 · 0⤊ 0⤋