A 2000kg roller coaster starts from rest at the top of the a hill (snapshot A) 17 meters high, then coasts to the bottom of the hill (snapshot B) which is at ground level (h=0M). Assume the track is frictionless. Find the speed at the bottom.

Why do astronauts in the space shuttle weigh less?

This is a form of winter precipitation. it is frozen precipitation falling as ice pellets. snowflakes melt into raindrops as they pass through a thin layer of warmer air. the raindrops then refreeze into particles of ice when they fall into a layer of sub-freezing air near the surface of the earth. this precipitation is called a) hail. b) rain. c) sleet. d) snow.

Determine the force the sun exerts on an object with a mass of 80.0 kg if that object is on the earth. what is the force exerted by the moon on the same object? what is the force the earth exerts on it?