- #1
terryds
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Homework Statement
Two titanium balls approaches each other with same speed and then collides elastically. After the colision, one of the ball which mass is 300 g becomes motionless.
Determine the mass of another ball
Homework Equations
Conservation of momentum and energy
The Attempt at a Solution
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(I use (+) sign for the direction of 0.3 kg ball movement)
p = p'
0.3 v - m v = 0 + m v'
E=E'
(1/2)(0.3)v^2 + (1/2) m v^2 = (1/2) m (v')^2
0.3 v^2 + 1/2(m)(v^2) = (1/2) m (v')^2
There are three unknowns : m,v, and v' yet I can only find two equations.
Please help