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The work-energy principle states that the net work done on an object changes its kinetic energy. While work done by propulsive forces, such as driving force of an engine, increases kinetic energy, work done against resistive forces, such as forces from the brakes, will cause kinetic energy to be lost. Considering the work-
Equations Associated with Newton’s Laws Impulse: 𝑰⃗=∆𝒑⃗⃗=𝑭⃗⃗ 𝒂𝒗𝒈 ∙∆ ∑ ⃗= 𝑎⃗, w= , Rotational Motion and Torque
thermal energy for a change of state = mass × specific latent heat. E = m L. For gases: pressure × volume = constant. p V = constant. weight = mass × gravitational field strength. W = m g. work done = force × distance (along the line of action of the force) W = F s. force = spring constant × extension.
Use work and energy principles to calculate a speed or a height or an energy value. Most problems include little to no little scaffolding. Includes 10 problems.
Power is the rate of work done in a unit of time. The unit of the power from the equation given above, joule/s, however, we generally use the unit of power as watt. 1joule/s=1watt. ENERGY. The capability of doing work is called energy. If something has energy then it can do work. It has the same unit with work joule.
Our equation sheet from various sections of introductory physics. Including equations from motion, forces, energy, momentum, electricity and waves.
Work, Energy and Power Cheat Sheet. In this chapter, we will learn to solve problems regarding the motion of a particle by considering its energy. This chapter is split up into three parts: In the first, we will discuss kinetic and gravitational potential energies and learn about the idea of “work done”.
