Calculations Involving Potential & Kinetic Energy

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Kinetic and Potential Energy

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Presentation transcript:

Calculations Involving Potential & Kinetic Energy

Gravitational Potential Energy Is the energy possessed by an object due to its height relative to some other surface. It is directly proportional to its mass, its height, and gravitational field strength.

Example 1 A 3.0 kg cat is perched on a 2.0 m high shelf. What is the cat’s gravitational potential energy?

Example 2 A diver on a diving board at a height of 5.0 m dives into the water experiencing a loss in gravitational potential energy of 2655 J. What is the diver's mass?

Kinetic Energy Is the energy possessed by an object in motion The amount of kinetic energy possessed by an object proportional to its mass and to the square of its speed.

Example 3 A 2500.0 kg car is travelling at 80.0 km/h (22.222 m/s). What is its kinetic energy?

Example 4 A runner of mass 59 kg possesses a kinetic energy of 1.3 kJ. What is her speed?