A 0.300-kg puck, initially at rest on a horizontal, frictionless surface, is str

Question

A 0.300-kg puck, initially at rest on a horizontal, frictionless surface, is struck by a 0.200-kg puck moving initially along the x axis with a speed of 2.00 m/s. After the collision, the 0.200-kg puck has a speed of 1.00 m/s at an angle of = 50.0° to the positive x axis (see the figure below). (a) Determine the velocity of the 0.300-kg puck after the collision. 1 Incorrect: Your answer is incorrect. Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. m/s (b) Find the fraction of kinetic energy transferred away or transformed to other forms of energy in the collision. 2 Incorrect: Your answer is incorrect.

Explanation / Answer

(a) Let the 0.30 kg puck have speed v at an angle of ? below the positive x-axis after the collision.

Resolving in the +x-direction:

Momentum before collision = 0.20*2 + 0.30*0 = 0.4 kg m/s.
Momentum after collision = 0.20*1*cos(50

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