Free Fall: Suppose a ball is thrown straight up and experiences no appreciable air resistance. What is its acceleration just before it reaches its highest point?
A. zero
B. slightly less than g
C. exactly g
D. slightly greater than g
Answer: C
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Parallel-Plate Capacitor: Two parallel square metal plates, 8.4 cm on each side, are 2.5 mm apart and carry equal but opposite charge uniformly distributed over their facing surfaces. How much excess charge is there on each plate if the electric field between the plates has a magnitude of 2.0 × 106 N/C? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
Fill in the blank(s) with the appropriate word(s).
An anti-proton would have
A) negative charge and positive mass. B) no charge and positive mass. C) negative charge and negative mass. D) positive charge and negative mass. E) positive charge and positive mass.
As a skier gains speed skiing down a slope, ______ energy is being converted to _________ energy
Fill in the blank(s) with correct word
A policeman walks on his beat back and forth. His average speed is determined from
A. time divided by how far he ends up from the starting point. B. his velocity divided by the time. C. time divided by his total distance covered. D. his total distance covered divided by the time.