A 5.1 g coin sliding to the right at 26.4 cm/s makes an elastic head-on collison with a 15.5 g coin that is initially at rest. After the collision, the 5.1 g coin moves to the left at 10.2 cm/s.
(a) Find the final velocity of the other coin.
(b) Find the amount of kinetic energy transferred to the 15.5 g coin.
2007-12-11 16:11:40 · 1 answers · asked by Kecin S 1 in Science & Mathematics ➔ Physics
Momentum is always conserved during collisions.
Initial momentum: ( 5.1 g ) ( 26.4 cm / s ) + 0
Final momentum: ( 5.1 g ) ( -10.2 cm / s ) + ( 15.5 g ) ( v )
Set these expressions equal and solve for the unknown velocity.
The kinetic energy of the second coin after the collision is
1/2 ( 15.5 g ) ( 1 g / 1000 kg ) v²
all of which was transferred from the first coin.
2007-12-11 16:27:58 · answer #1 · answered by jgoulden 7 · 0⤊ 0⤋