The fundamental force that governs the motion of the planets is
A. strong force.
B. weak force.
C. electromagnetic force.
D. gravitational force.
D. gravitational force.
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Contrast the sizes and membership of the Local Group and Virgo Cluster
What will be an ideal response?
In the case of constant acceleration, the average velocity equals the instantaneous velocity:
a. at the beginning of the time interval. b. at the end of the time interval. c. half-way through the time interval. d. three-fourths of the way through the time interval.
A nearsighted person has a far point of 33 cm. What focal length contact lens would allow her to see in the distance?
A. 33 cm B. -33 cm C. 67 cm D. -67 cm E. 3.0 m
A student weighing 200 N climbed a flight of stairs 9.0 m high in 4 s. How much work was done by the student?
a. 1800 J b. 800 J c. 1800 W d. 800 W e. 50 W