# A branch falls from a tree. How fast is the branch moving after 0.28 seconds?

Nov 30, 2015

$2.74 \text{m/s}$

#### Explanation:

Since the branch is falling under gravity we can use one of the equations of motion:

$v = u + a t$

This becomes:

$v = 0 + \text{g} t$

$\therefore v = 9.8 \times 0.28 = 2.74 \text{m/s}$

This assumes no air resistance.