A 3.0-kg ball with an initial velocity of 
m/s collides with a wall and rebounds with a velocity of 
m/s. What is the impulse exerted on the ball by the wall?
A.
N
sB.
N
sC.
N
sD.
N
sE.
N
sAnswer: B
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A circular coil of copper wire is lying flat on a horizontal table. A bar magnet is held with its south pole downward, vertically above the center of the coil. The magnet is kept stationary with respect to the coil
As viewed from above, you can say that the magnet induces A) counterclockwise current in the loop. B) clockwise current in the loop. C) no current in the loop. D) an emf but no electric current in the loop. E) Not enough information is provided.
Which one of the following is true?
A) Radio waves have a higher energy than gamma rays. B) Radio waves have a higher frequency than ultraviolet radiation. C) Infrared radiation has a longer wavelength than blue light. D) Ultraviolet radiation has a longer wavelength than red light. E) Blue light has a longer wavelength than red light.
Which Lagrange points in the Earth—Moon system are stable?
A) L1 only B) L4 and L5 C) L2 and L3 D) all are stable
The acceleration of an object as a function of time is given by a(t) = (3.00 m/s3)t. If the object is at rest at time t = 0.00 s, what is the velocity of the object at time t = 5.00 s?
A) 15.0 m/s B) 37.5 m/s C) 0.00 m/s D) 12.0 m/s E) 75.0 m/s