Question

What is the change in velocity of a brick that falls for 3.5 seconds?

Answer 1

Assume initial velocity `v = 0`

Since the brick is falling, assume acceleration is due to gravity
`g = 9.8 m/s^2`

final velocity `v' = v + g*t`

`v' = 0 + 9.8 * 3.5`
`v' = 34.3 m/s`