Doug hits a hockey puck, giving it an initial velocity of 7.0 m/s. If the coefficient of kinetic friction between ice and puck is 0.050, how far will the puck slide before stopping?
a. 19 m
c. 37 m
b. 25 m
d. 50 m
D
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A rocket is launched from the origin with an acceleration of 20.0 
at an angle of 30.0 degrees above the horizontal. The launch acceleration lasts for 2.00 seconds at which time the fuel is exhausted. The rocket then falls with an acceleration of 9.80 
downward. What is the maximum height?
A. 22.3 m B. 27.5 m C. 30.5 m D. 36.7 m E. 20.0 m
Planetary rings are
A) composed of a large number of individual particles that orbit their planet in accord with Kepler's third law. B) orbiting in the equatorial plane of their planet. C) known to exist for all of the jovian planets. D) all of the above
Increasing the temperature of a blackbody by a factor of 3 will increase its energy by a factor of
A) 3. B) 6. C) 9. D) 12. E) 81.
A rod (length = 2.0 m) is uniformly charged and has a total charge of 40 nC. What is the magnitude of the electric field at a point which lies along the axis of the rod and is 3.0 m from the center of the rod?
a. 40 N/C b. 45 N/C c. 24 N/C d. 90 N/C e. 36 N/C