Main Idea: Kinetic energy is all about motion - think of it as the "oomph" something has because it's moving!

• Definition: The energy something has because it's moving.
• Think of it as the energy you feel when you're zooming down a slide! The faster you go, the more kinetic energy you have.
• The faster objects move, the more KE they gain.

• Newton's second law:\(a = \frac fm\)
  Where

• a = acceleration
• F = force
• m = mass

• Speed when something is accelerated from rest:\(U = \frac Fm×\ T\)

• Pro Tip: If the object was already at some speed (u) then remember to take that into account!

• When you do work on an object, you're giving it energy!
• The equation for the work done (and the gain in KE) is: Δ\(Ek = \frac12{mv^2}\) when the starting speed is 0.
• If our object already had a speed (u), then the change in KE is: Δ\(Ek = \frac 12{m(v^2-u^2)}\)
• Note: Pay attention to where the squares (powers) are!