In this v=u+at equation, u is initial velocity. What is impact speed?Īn impact velocity is the total speed of an object when it makes an impact with the ground or another object after falling from a certain distance. But this alone does not permit us to calculate the force of impact! Average impact force = F = N. The kinetic energy just before impact is equal to its gravitational potential energy at the height from which it was dropped: K.E. To calculate the force of impact, divide kinetic energy by distance. How do you calculate velocity from impact height? How do you calculate impact? Multiply feet per second by 0.68 to find the object’s velocity in miles per hour. If you want to know the velocity of the object at some point before it hits the ground, use the distance the object has fallen at that point in place of the distance to the ground in either equation. How do you find velocity right before impact? Hence, the velocity on imact is 19.799ms. Velocity on impact is the velocity of the ball when it hits the surface.