What is the period (in hours) of a satellite circling Mars 100 km above the planet's surface? The mass of Mars is 6.42 × 1023 kg, its radius is 3.40 × 106 m, and G = 6.67 × 10-11 N ? m2/kg2
A) 1.75 h
B) 1.25 h
C) 1.15 h
D) 1.00 h
E) 1.45 h
A
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Ellen says that whenever the acceleration is directly proportional to the displacement of an object from its equilibrium position, the motion of the object is simple harmonic motion. Mary says this is true only if the acceleration is opposite in direction to the displacement. Which one, if either, is correct?
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Three boxes in contact rest side-by-side on a smooth, horizontal floor
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The massive ram of a pile driver falling from rest strikes a pile with a speed that depends on the
A) initial height of the ram. B) initial potential energy of the ram. C) distance the ram falls. D) all of the above