The quantity 1/2 mv2 is known as
A. work.
B. kinetic energy.
C. energy.
D. power.
E. potential energy.
Answer: B. kinetic energy.
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A Mack truck and a Volkswagen traveling at the same speed have a head-on collision. The vehicle that undergoes the greatest change in velocity will be the
A) Volkswagen. B) Mack truck. C) same for both.
One star has a surface temperature of 6000 K and another has a surface temperature of 7000 K
If the two stars have the same absolute luminosity, and if the radius of the 6000 K star is R6 and the radius of the 7000 K star is R7, what is the ratio R6/ R7? A) 0.7 B) 1.2 C) 1.4 D) 1.6 E) 1.9
The point P lies along the perpendicular bisector of the line connecting two long straight wires S and T that are perpendicular to the page. A set of directions A through H is shown next to the diagram. When the two equal currents in the wires are directed up out of the page, the direction of the magnetic field at P is closest to the direction of
a.
E.
b.
F.
c.
G.
d.
H.
e.
A
The area under the curve on a Force versus time (F vs. t) graph represents
A) impulse. B) momentum. C) work. D) kinetic energy. E) potential energy.