A ball of mass 0.540 kg moving east (+x direction) with a speed of 3.30 m/s collides head-on with a 0.740 kg ball at rest. If the collision is perfectly elastic, what will be the speed and direction of each ball after the collision?

Question

A ball of mass 0.540 kg moving east (+x direction) with a speed of 3.30 m/s collides head-on with a 0.740 kg ball at rest. If the collision is perfectly elastic, what will be the speed and direction of each ball after the collision?
a)ball originally at rest	  m/s	
b)ball originally moving east	  m/s

bobpursley · Answer

http://www.jiskha.com/display.cgi?id=1259111298

ami · Answer

i got -.5156 and 2.785 but both are wrong

bobpursley · Answer

The procedure laid out is exact. Recheck your math.