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Woolyabyss
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Homework Statement
A smooth sphere of mass 4 kg collides obliquely with another smooth sphere of mass m which is at rest.After impact the two spheres move at right angles to each other.If the coefficient of restitution was (4/7), calculate the value of m.
Homework Equations
m1u1 + m2u2 = m1v1 + m2v2
(v1 - v2)/(u1 - u2) = -e
The Attempt at a Solution
i is the horizontal unit vector,where i is along the line of the centres(of the spheres) at impact
j is vertical unit vector
since i is along there centres j is unchanged before and after the impact
conservation of momentum along the i axis
4u1 + m(0) = 4v1 + mv2 ... mv2 = 4u1 - 4v1
(v1 -v2)/(u1) = -4/7
I'm not sure what to do from here, I'd assume its something to do with them being at right angles after the impact?