Energy and Work

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Energy and Work by Mind Map: Energy and Work

1. Energy

2. Work

2.1. In physics, a force is said to do work if, when acting, there is a displacement of the point of application in the direction of the force.

2.2. W= F*d (cosΘ)

2.3. Measured in joules

3. Types of energy

4. Kinetic

4.1. KE=0.5*m*v^2

4.2. energy that a body possesses by virtue of being in motion

5. Potential

5.1. PE(grav)=mass*g*height

5.2. the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors

6. Gravitational Energy

6.1. Gravitational potential energy is RELATIVE

6.2. PE(grav)=mass*g*height

6.3. a pen being held above a table has a higher gravitational potential than a pen sitting on the table

6.4. Gravitational energy is the potential energy held by an object because of its high position compared to a lower position

7. Thermal Energy

7.1. Particles of a gas accelerating, creating heat.

7.2. Measured in joules

7.3. Can be generated by friction

8. Conservation of Energy

8.1. The energy of a system is constant

8.2. Energy cannot be created nor destroyed

8.3. Energy can only change form

8.4. True for any system with no external forces

9. Spring Force

9.1. PEspring=1/2*k*x^2

9.2. Hooke's Law

9.2.1. Spring force = spring constant x displacement

9.2.2. F=kx

10. Power

10.1. Power is the rate at which work is done

10.2. P=W/T (or) P=F/V

11. Work-Energy theorem

11.1. The net work done on an object equals to the change in the object’s kinetic energy

12. Conservation of Mechanical Energy

12.1. E_t=KE+PE