Thread: Subsonic action

Originally Posted by Bill999

From memory double the weight at the same speed hits with 4 times the force

Nope, double the weight at the same speed is double the force. The same weight at double the speed is four times the force.

Originally Posted by Cigar

Nope, double the weight at the same speed is double the force. The same weight at double the speed is four times the force.

Kinetic energy(J)= 0.5 x m(kg) x V^2(Velocity in m/s)

So energy is proportional to weight or velocity squared.

Originally Posted by Josan

Kinetic energy(J)= 0.5 x m(kg) x V^2(Velocity in m/s)

So energy is proportional to weight or velocity squared.

thats what I thought too, a quadruple. But iv been wrong before

Originally Posted by Josan

Kinetic energy(J)= 0.5 x m(kg) x V^2(Velocity in m/s)

So energy is proportional to weight or velocity squared.

Correct (well almost, m = mass, not weight, and our high school science teachers told us there is a difference).

If you throw some numbers in the equation you will see that doubling the mass doubles the energy, and doubling the velocity increases the energy fourfold.