A ball is projected upward at time t=0.0 s, from a point on a roof m above the g

Question

A ball is projected upward at time t=0.0 s, from a point on a roof m above the ground. the ball rises, then it falls and strikes the ground. the initial velocity is 36.2 m/s. if the air resistance is negligible. the time when the ball strikes the ground is closest to? A ball is projected upward at time t=0.0 s, from a point on a roof m above the ground. the ball rises, then it falls and strikes the ground. the initial velocity is 36.2 m/s. if the air resistance is negligible. the time when the ball strikes the ground is closest to? A ball is projected upward at time t=0.0 s, from a point on a roof m above the ground. the ball rises, then it falls and strikes the ground. the initial velocity is 36.2 m/s. if the air resistance is negligible. the time when the ball strikes the ground is closest to?

Explanation / Answer

the time t is calculated as follows:

h = v0t - 0.5gt2

h = 36.2*t-0.5*9.8*t^2

substitute value og height h in the above equation and solve for t.

note: value of h missing in the data of question.

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