A rock attached to a string swings in a vertical circle. Which free-body diagram could correctly describe the force(s) on the rock when it is at the highest point, where
is the normal force, 
is weight, and 
is tension?
a.
b.
c.
d.
e.
c
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A car starts from rest and accelerates with a constant acceleration of 1.00 m/s2 for 3.00 s. The car continues for 5.00 s at constant velocity. How far has the car traveled from its starting point?
A) 24.0 m B) 9.00 m C) 19.5 m D) 4.50 m E) 15.0 m
The person who first explained the discrete hydrogen atom spectrum was __________
Fill in the blank(s) with correct word
An object moves with a constant velocity. Which of the following cannot be true for the object?
1.No forces act on the object. 2.A single force acts on the object. 3.Two forces act on the object. 4.Three forces act on the object.
A 3.0-kg cat runs to the left at 10 m/s and a 10-kg dog runs to the right at 4.0 m/s. The total kinetic energy is
A. 146 Joule. B. -35 Joule. C. -70 Joule. D. 230 Joule. E. 0.