A particle is projected vertically upwards from ground level with an initial velocity of 34.94m/s. Neglecting air resistance, calculate the total time taken, in seconds, for the particle to hit the ground again.

Question

Take the magnitude of the acceleration due to gravity to by 9.81m/s^2.

Answer 1

Find the time to the top and double it.

v = Vi - g t
at the top, v = 0
0 = 34.9 - 9.81 t
t = 34.9/9.81
2 t = 2 * 34.9/9.81