the kinetic energy of the ball at launch equals the gravitational potential energy at the peak
½ m v² = m g h
v = √(2 g h) = √(2 * 9.8 * 20) m/s
A ball is thrown vertically upwards from the ground and it reaches a height of 20m. Calculate
the speed the ball had when it was launched.
I don't know how to solve this due to the fact that in the problem we only have the height as data , not even mass.
2 answers
But wait oh did you get the mass?
1 answer