A 0.160-kg hockey puck is moving on an icy, frictionless, horizontal surface. At

Question

A 0.160-kg hockey puck is moving on an icy, frictionless, horizontal surface. At t = 0 the puck is moving to the right at 3.10 m/s.

(a) Calculate the velocity of the puck (magnitude and direction) after a force of 16.5 N directed to the right has been applied for 0.050 s.
m/s

+x direction, +y direction, -x direction, or -y direction?

(b) If instead, a force of 12.8 N directed to the left is applied from t = 0 to t = 0.050 s, what is the final velocity of the puck?
m/s

+x direction, +y direction, -x direction, or -y direction?

Explanation / Answer

final momentum = initial momentum + impulse

m

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