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
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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.
Consider the motion of a 1.00-kg particle that moves with potential energy given by
U(x) = (-2.00 J?m)/x + (4.00 J?m2)/x2. Suppose the particle is moving with a speed of 3.00 m/s when it is located at x = 1.00 m. What is the speed of the object when it is located at x = 5.00 m? A) 2.13 m/s B) 4.68 m/s C) 3.00 m/s D) 3.67 m/s
How many arcseconds are in 1°?
A) 60 B) 360 C) 3600 D) 100 E) 10,000
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