How can I calculate the joules for speeding objects?

1. Sep 16, 2012

promeus

Ok,lets say an object is moving at a constant speed of Mach 7 for 20000ft. The weight for the object is 2000 lbs.

What formulas could I use to calculate the energy for accelerating objects,or this one in particular?

2. Sep 16, 2012

Staff: Mentor

The formula for kinetic energy is KE = 1/2mv2.

m = mass, in kg
v = speed, in m/s

KE = kinetic energy, in joules

3. Sep 16, 2012

DrGreg

By the way, something moving at constant speed is not accelerating!

4. Sep 16, 2012

promeus

Thank you I just realized my error,but I was asking for general equations when I said "accelerating objects".

5. Sep 16, 2012

Zula110100100

KE = .5m(v0^2) + mas = .5m(v0^2) + Fs = .5m(v0^2) + F(v0t + .5(a)(t^2)) ?