A5kg object is released from rest near the surface of a planet such that its gravitational field is considered to be constant. the mass of the planet is unknown. after 2s, the object has fallen 30m. air resistance is considered to be negligible. what is the gravitational force exerted on the 5kg object near the planet’s surface?

Newton's law of universal gravitation states that the force f between two masses, m1 and m2, is given below, where g is a constant and d is the distance between the masses. find an equation that gives an instantaneous rate of change of f with respect to d. (assume m1 and m2 represent moving points.)

The us government wants to allocate billions of dollars in the next 10 years to assure our future energy security. the funds will be spread among a variety of possible energy resources. where do you think the government should put the greatest support: solar energy, wind energy, clean coal, oil exploration, gas exploration, or a combination of sources? are there other efforts that should be explored? support your position with cited information for both questions.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?