A 15 kg penguin waddling east at a velocity of 7 m/s collides with a stationary 10 kg penguin. After the collision the 15 kg penguin is traveling at a velocity of 4.2 m/s 20 degrees S of E.
a) what is the velocity of the 10 kg penguin after collision?
b) is this collision elastic or inelastic?
i have no idea how to do this question, step by step explanation please, much appreciated!
(a)Let the velocity of 10 kg penguin is v m/s after the collision,
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