When a boxer hits a punching bag, the strength of his punch depends on how much force the bag can

A) endure.
B) exert on the boxer's fist.
C) soften.


Answer: B

Physics & Space Science

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A hunter on level ground fires a bullet at an angle of 10 degrees above the horizontal while simultaneously dropping another bullet from the level of the rifle. Which bullet will hit the ground first?

A) the one dropped B) the one fired C) both hit at the same time.

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A 3.0-kg mass moving in the positive x direction with a speed of 10 m/s collides with a 6.0-kg mass initially at rest. After the collision, the speed of the 3.0-kg mass is 8.0 m/s, and its velocity vector makes an angle of 35° with the positive x axis. What is the magnitude of the velocity of the 6.0-kg mass after the collision?

a. 2.2 m/s b. 2.9 m/s c. 4.2 m/s d. 3.5 m/s e. 4.7 m/s

Physics & Space Science