- #1
mburt
- 52
- 0
So I was really bored today, and while pondering to myself I wondered why this isn't a valid formula for kinetic energy (say for a laterally moving truck):
E = mdx2 / t2
So I did a little test example, say a moving truck with:
m = 2000 kg
dx = 150 m
t = 10s
And plugged it in the formula and got 450 000 kg m2/s2 (J).
After remember the ACTUAL kinetic energy formula (Ek = 0.5mv^2), I was wondering where on Earth the 0.5 came from? In reality the truck has a kinetic energy of 225 000 J
So my question is simply this: (probably a basic one) Why is there a 1/2 constant in the kinetic energy formula?
E = mdx2 / t2
So I did a little test example, say a moving truck with:
m = 2000 kg
dx = 150 m
t = 10s
And plugged it in the formula and got 450 000 kg m2/s2 (J).
After remember the ACTUAL kinetic energy formula (Ek = 0.5mv^2), I was wondering where on Earth the 0.5 came from? In reality the truck has a kinetic energy of 225 000 J
So my question is simply this: (probably a basic one) Why is there a 1/2 constant in the kinetic energy formula?