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A ball is projected into the air with 900 J of kinetic energy that is transformed to potential energy at the top of its trajectory. When it returns to its original level after encountering air resistance, its kinetic energy is

When air gains speed in sweeping across a rooftop its internal pressure is

If a projectile is fired straight up at a speed of 10 m/s, neglecting air resistance, the time it takes to reach the top of its path is

Find the average speed of a rabbit that runs a distance of 26 m in a time of 1.3 s.

A bullet fired from a rifle begins to fall

A school bus slows to a stop with an average acceleration of -2.1 m/s2. Find the time that the bus takes to slow from 9.80 m/s to a stop.  (4 points)

If Earth’s mass somehow decreased with no change in its radius, your weight would

What is the magnitude and direction of the gravitational force that acts on a person who weighs 500 N at Earth’s surface?  (G=6.67 x 10-11 and the radius of Earth is 6.357 x 106 m)

A diesel locomotive coasting at 10 km/h has an inelastic collision with a stationary flatcar. The locomotive weighs four times as much as the flatcar. How fast does the locomotive-flatcar combination move when stuck together?

A school bus slows to a stop with an average acceleration of -2.2 m/s2. Find the time that the bus takes to slow from 9.60 m/s to a stop.  (4 points)