Asked in PhysicsBaseball Rules and Regulations
Calculate the velocity of ball just before it hits the ground when dropped from a height of 6m?
May 06, 2013 5:31AM
Here are two different methods to solve this kind of problem.
1) Use one of the formulae for constant acceleration. In this case, vf2 = vi2 + 2as, where vf is the final velocity, vi is the initial velocity (zero in this case), a is the acceleration (9.8 meters / second2), and s is the distance.
2) Do an energy calculation, as follows: Calculate the potential energy at a height of 6 meters, with the formula PE = mgh. Since we can assume that the entire potential energy gets converted to kinetic energy just before the ball hits the ground, solve for velocity, in the kinetic energy formula.