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Classical Mechanics

Kinetic Energy

Kinetic Energy Warmup

         

Two cannonballs have equal mass. If the first cannonball has greater momentum, then which cannonball has greater kinetic energy?

A brick is tied to a rope and is whirled in a circular path such that the brick moves with constant speed. How does the kinetic energy of the brick change with time?

When a ball is thrown up into the air, how does its kinetic energy change with time?

Two trucks of equal mass are moving towards each other at equal speeds.

  • One of the truck drivers calculates the total kinetic energy of the trucks, in her frame.

  • A person standing on the ground also calculates the total kinetic energy of the trucks, in his frame.

Who has calculated a greater value of kinetic energy?

If the speed of a ship doubles, then what happens to its kinetic energy?

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