Two satellites are placed in geosynchronous orbits, orbits with a period of 24 hours, where each satellite hovers over a spot on the Earth's equator. Satellite B has three times the mass of satellite A. What is the relationship between the magnitudes of the gravitational forces of the Earth on the two satellites?
A.
FA.B.
FA.C.
D.
E.
Answer: D
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Astronaut Mark Uri is space-traveling from planet X to planet Y at a speed of relative to the planets, which are at rest relative to each other
When he is precisely halfway between the planets, a distance of 1.0 light-hour from each one as measured in the planet frame, nuclear devices are detonated on both planets. The explosions are simultaneous in Mark's frame. What is the difference in the time of arrival of the flashes from the explosions as observed by Mark? A) 0 min B) 180 min C) 90 min D) 360 min E) 113 min
A 20.0 kg box slides down a 12.0 m long incline at an angle of 30.0 degrees with the horizontal. A force of 50.0 N is applied to the box in the upward direction. The applied force F makes an angle of 0.00 to the incline. If the incline has a coefficient of kinetic friction of 0.000, then the increase in the kinetic energy of the box is
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State the law of the conservation of mechanical energy
What will be an ideal response?
In a two-body collision, if the kinetic energy of the system is conserved, then which of the following best describes the momentum after the collision?
a. must be less b. must also be conserved c. may also be conserved d. is doubled in value