Conservation of Momentum - Elastic Collision

[rocapp]

Homework Statement

A curling stone with a mass of 20kg slides across the ice at 1.5m/s. It collides head on with a stationary 0.16kg hockey puck. After the collision, the puck's speed is 2.5m/s. Assume the motion occurs in the horizontal direction. What is the stone's final velocity? Follow the steps below to answer the question.

Homework Equations

P=mv
P_i=P_f

The Attempt at a Solution

m_stonev_ixstone + m_puckv_ixpuck = m_stonev_fxstone + m_puckv_fxpuck

20*1.5 + .16*0 = 20v_fxstone + .16*2.5
v_fxstone = 1.48 m/s

 

[tms]

Looks okay to me. What's your question?

 

[rocapp]

Haha. Well if it's correct, I suppose I have none. Thanks!