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Q. During a workout, the football players ran up the stadium stairs in 73 s. The stairs are 120 m long and inclined at an angle of 30°. If a typical player has a mass of 101 kg, estimate the average power output on the way up. Ignore friction and air resistance.

Q. A 65.5 kg ice skater moving to the right with a velocity of 2.67 m/s throws a 0.19 kg snowball to the right with a velocity of 21.7 m/s relative to the ground. What is the velocity of the ice skater after throwing the snowball?

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