An object falls from the Transco Tower in Houston and takes 15 seconds to reach the ground. What is its velocity at impact if air resistance is ignored?

Answer 1

v = v₀ + at

You know v₀, a, and t.

v₀ = 0 (you're dropping the ball rather than throwing it down).

a = 9.8 m/sec² (gravitational constant)

t = 15 sec.

Solve for v.