Total Mechanical Energy The total mechanical energy of a system is defined to be the sum of: The total potential energy of the system The total kinetic.

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Presentation transcript:

Total Mechanical Energy The total mechanical energy of a system is defined to be the sum of: The total potential energy of the system The total kinetic energy of the system The symbol used for total mechanical energy is ME. The units of ME are joules. The total mechanical energy of a system can be negative if and only if the total potential energy is negative and has a greater magnitude than the total kinetic energy. The total mechanical energy of a system is defined to be the sum of: The total potential energy of the system The total kinetic energy of the system The symbol used for total mechanical energy is ME. The units of ME are joules. The total mechanical energy of a system can be negative if and only if the total potential energy is negative and has a greater magnitude than the total kinetic energy.

Example A 50.0 gram tennis ball is at rest on the ground. The tennis ball is then thrown upward…

A 50.0 gram tennis ball is thrown upward – when it is at a height of 0.75 meters above the ground… The change in gravitational potential energy of the tennis ball is: 0.75 m

A 50.0 gram tennis ball is thrown upward – when it is at a height of 0.75 meters above the ground… When the ball reaches the height of 0.75 m, it is traveling at 1.35 m/s. The kinetic energy of the ball is: 1.35 m/s

A 50.0 gram tennis ball is lifted to a height of 0.75 meters above the ground. When the ball reaches the height of 0.75 m, it is traveling at 1.35 m/s. What is the total mechanical energy of the system? 0.75 m 1.35 m/s

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