The questions below concern a situation in which an air hockey player hits a 0.11 kg air hockey puck with a 0.32 kg paddle. Assume that the puck rides on a frictionless cushion of air.
a) If the paddle exerts a 10 N force on the puck, what force does the puck exert back on the paddle?
Less than 10 N, but not zero.
Exactly 10 N.
More than 10 N.
Zero, because the puck cannot exert a force back on the paddle.
(b) Which of Newton's laws of motion did you use to answer question (a)?
Newton's first law of motion.
Newton's second law of motion.
Newton's third law of motion.
(c) While the paddle exerts a 10 N force on the puck, what acceleration does the puck experience?
m/s/s
(d) Which of Newton's laws of motion did you use to answer question (c)?
Newton's first law of motion.
Newton's second law of motion.
Newton's third law of motion.
(e) Just after the puck leaves the paddle, it will...
move at a constant speed because the paddle is no longer pushing on it.
continue to speed up for a brief period because the force of the paddle continues to travel with it.
immediately stop because the paddle is no longer pushing it forward.
(f) Which of Newton's laws of motion did you use to answer question (e)?
Newton's first law of motion.
Newton's second law of motion.
Newton's third law of motion.
