Question

falling objects drop with an average acceleration of 9.8m/sec/sec. if an object falls from a tall building how long will it take before it reaches a speed of 49m/sec

Answer 1

Answer:

5 seconds

Explanation:

Acceleration = (final velocity - initial velocity) ÷ time

$a = \frac{v - u}{t}$

$9.8 = \frac{49 - 0}{t}$

$9.8 = \frac{49}{t}$

$9.8t = 49$

$t = \frac{49}{9.8}$

$t = 5$