Why are astronauts weightless in the Space Station?                                                                                               

Why do we see essentially the same face of the Moon at all times?

On what day does the sun rises due East, with the days getting longer in the Northern Hemisphere?

Suppose you drop a 10-pound weight and a 5-pound weight on the Moon, both from the same height at the same time. What will happen?                                                                                                                                      

Newton’s second law of motion tells us that the net force applied to an object equals its

The figure above shows the sun at noon as seen from Mission College. Where is the sun on the Winter Solstice?

Where is the location of the sunrise on the winter solstice?

According to the universal law of gravitation, if you triple the distance between two objects, then the gravitational force between them ________.

A young girl wishes to select on of the frictionless playground slides illustrated below to give her the greatest possible speed when she reaches the bottom of the slide. Which of the slides illustrated in the diagram above should she choose?

A 0.5-kg ball is moving in a circular path at the end of a string with a constant speed of 3 m/s. The length of the string is 1 m. What is the magnitude of the centripetal force exerted by the string on the ball to produce this motion?