A CD with a diameter of 12.0 cm starts from rest and with a constant angular acceleration of 1.00 
acquires an angular velocity of 5.00 rad/sec. The CD continues rotating at 5.00 rad/sec for 15.0 seconds and then slows to a stop in 12.0 second with a constant angular deceleration. What is the total acceleration of a point 4.00 cm from the center at the time 10.0 seconds from the start?
A. 0.65 
B. 1.00
C. 1.25
D. 1.37
E. 1.86
B. 1.00
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Proportional Reasoning: Car A is traveling at twice the speed of car B. They both hit the brakes at the same time and decrease their velocities at the same rate. If car B travels a distance D before stopping, how far does car A travel before stopping?
A. 4D B. 2D C. D D. D/2 E. D/4
Why were the mass and density of Pluto unknown until Charon was found?
What will be an ideal response?
A ball is thrown at a 30.0° angle above the horizontal across level ground. It is released from a height of 2.00 m above the ground with a speed of 18.0 m/s. How far does the ball travel horizontally before it strikes the ground?
A) 28.6 m B) 24.0 m C) 26.5 m D) 10.5 m E) 31.7 m
According to the solar nebula theory, planetary development in the solar nebula began with:
A) the growth of dust grains. B) the formation of ice caps. C) the fission of helium atoms. D) the fission of hydrogen atoms.