A torque acting on a body tends to produce
A. linear velocity.
B. angular rotation.
C. a new center of gravity.
D. equilibrium.
Answer: B
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A stone is thrown from the top of a building with an initial velocity of 20 m/s downward. The top of the building is 60 m above the ground. How much time elapses between the instant of release and the instant of impact with the ground?
a. 2.0 s b. 6.1 s c. 3.5 s d. 1.6 s e. 1.0 s
Which has the greater kinetic energy-a 1-ton car moving at 30 m/s or a half-ton car moving at 60 m/s?
A. The 1-ton car B. Both have the same kinetic energy C. The half-ton car D. It cannot be determined because the mass of the cars can't be found
The main form of radiation that our bodies emit is
a. ultraviolet. b. infrared. c. x-ray. d. microwave. e. blackbody.
Two cars are traveling at the same speed and hit the brakes at the same time. Car A decelerates (decreases its velocity) at twice the rate of car B. If car A travels a distance D before stopping, how far does car B travel before stopping?
A) 4D B) 2D C) D D) D/2 E) D/4