Banked Curves: When a car goes around a banked circular curve at the proper speed speed for the banking angle, what force cause it to follow the circular path?
A. the normal force from the road
B. the friction force from the road
C. gravity
D. No force causes the car to do this because the car is traveling at constant speed and therefore has no acceleration.
Answer: A
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Venus may have started with an ocean's worth of water. Where is its water now?
A) The original water remains vaporized in the atmosphere due to Venus's intense heat. B) Most of the water is frozen beneath the surface. C) Most of the water combined with rocks in chemical reactions. D) The water was lost when ultraviolet light broke apart water molecules and the hydrogen escaped to space. E) The water changed to carbon dioxide through chemical reactions.
Exhibit 4-2Newton approximated motion in a circle as a series of linear motions, as in the polygon below.
Assume that the particle moves at constant speed vA from A to B, and at constant speed vB from B to C.Use this exhibit to answer the following question(s).
Refer to Exhibit 4-2. The direction of the change in velocity, 
, at point B, is shown by the arrow in
A.
B.
C.
D.
E.
The electric field in a region of space is given by Ex = (3.0x) N/C, Ey = Ez = 0, where x is in m. Points A and B are on the x axis at xA = 3.0 m and xB = 5.0 m. Determine the potential difference VB - VA
a. -24 V b. +24 V c. -18 V d. +30 V e. -6.0 V
The mass of the Moon is 7.4 × 1022 kg, its radius is 1.74 × 103 km, and it has no atmosphere. What is the acceleration due to gravity at the surface of the Moon? (G = 6.67 × 10-11 N ? m2/kg2 )
A) 0.80 m/s2 B) 9.8 m/s2 C) 4.9 m/s2 D) 1.6 m/s2 E) 2.8 × 106 m/s2