A particle is projected vertically upwards at 7 m/s from a point 38.7 m above the ground. Find the maximum height the particle can reach. Consider the acceleration due to gravity to be 9.8 m/s2.
A ball is projected vertically upwards from the edge of a cliff, which is 186.2 m above the ground. If during the third second it covers a distance of 2.45 m upwards, find the time that the ball takes to reach the ground at the bottom of the cliff. Take the gravitational acceleration to be 9.8 m/s2.