Hi there,(adsbygoogle = window.adsbygoogle || []).push({});

i need to know if my approch to this question is right

Particles A, B and C , each of mass m, lie at rest in a straight line in the order stated. A is projected directly towards B with velocity u. The coefficient of restitution is 0.5 in each impact that follows. Show that there will be three impacts in total and find the final velocities of each particle.

working with a and b first

work out momentum before mom = mu +0

and momentum after mom = mv1 + mv2

mu = m(v1 +v2)

u = v1 +v2 {1}

then using the equation velocity of separation = e x velocity of approach

v2-v1 = e(u1-u2)

v2-v1 = 0.5(u-0)

v2-v1 = 0.5u {2}

now adding {1} + {2} > v2=0.75u

v1=0.25u

i would appreciate some advice on my technique/approch to this question

thanks in advance

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Momentum and Impulse

**Physics Forums | Science Articles, Homework Help, Discussion**