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10 minutes
Language: Question Loop

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What is work and how to calculate it.

Work done is energy transferred.
Every time there is a change in energy, there is a force exerting on a body that is moving. The force is doing a work equal to the energy being transferred.

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What is kinetic energy  (KE) and how to calculate it.

Kinetic Energy is the energy of body that is travelling at a certain speed. It depends on the mass of the body and on the speed.

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- what is potential energy and how to calculate it;
- what is kinetic energy and how to calculate it;
- what is mechanical energy and how to calculate it;
- what is work and how to calculate it;
- in what way all this stuff is connected.
- How to calculate the velocity of the bob of the pendulum through the conservation of mechanical energy

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What is gravitational potential energy  (PE) and how to calculate it.

Gravitational Potential Energy is the energy of a body that is placed at a certain height and that is subject to a force (its weight).

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10 minutes
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The Mechanical Energy of a body is the sum of the kinetic energy of the body and of its potential energy.
When there is no friction, the total amount of mechanical energy is constant.

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Can you can calculate the speed of the Bob at the bottom of the path?