Many of the known extrasolar planets orbit their stars
A) more closely than Mercury orbits the Sun
B) at about the same distance as the Earth orbits the Sun
C) at about the same distance as the planet Jupiter orbits the Sun
D) much further than the distance the planet Jupiter orbits the Sun
A
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A 2.4-kg ball falling vertically hits the floor with a speed of 2.5 m/s and rebounds with a speed of 1.5 m/s. What is the magnitude of the impulse exerted on the ball by the floor?
A.
sB.
sC.
sD.
sE.
sA 2.0 kg mass is connected to a spring with a spring constant of 9.0 N/m. The displacement is given by the expression x(t) = 12.0 cm sin 
What is the maximum displacement of the simple harmonic motion?
A. 8.0 cm B. 12 cm C. 20 cm D. 24 cm E. 30 cm
The total kinetic plus potential energy of a body
a. can be negative. b. always stays constant if the body is freely falling. c. always stays constant if friction is acting. d. can remain constant even if the body's speed is decreasing.
A small car meshes with a large truck in a head-on collision. Which of the following statements concerning the magnitude of the average collision force is correct?
A) The truck experiences the greater average force. B) The small car experiences the greater average force. C) The small car and the truck experience the same average force. D) It is impossible to tell since the masses are not given. E) It is impossible to tell since the velocities are not given.