Amass m suspended by a spring with force constant k has aperiod t when set into oscillations on earth. its period on mars, whose mass is about 1/9 and radius 1/2 that of earth, is mostnearly

a) 1/3 t
b) 2/3t
c)t
d) 3/2t
e) 3 t

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?

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