A 0.280-kg croquet ball makes an elastic head-oncollision with a second ball initially at rest. The second ballmoves off with half the original speed of the first ball.(a) What is the mass of the second ball? (b) What fractionof the original kinetic energy (AK /K ) gets transferred tothe second ball?

Lectures 6 a nd 7 Relative Motion Motion from other p erspectives Uniform Circular Motion Speed is fixed Velocity and acceleration n ot 0 Directionally changing velocity Acceleration called “radial or centripetal” acceleration EQUATION a = v 2 c r Time it takes to complete one revolution is one “period”, T (in seconds) EQUATION v = 2πr = 1 circumference T 1 period Rotational (Angular) Rotation θis ositive g oing counterclockwise f rom p ositive xaxis (x,y) or (r, θ s coordinates arc length