Question

An object is dropped from a platform100 ft high. Ignoring wind resistance, how long will it take to reach the ground?

Answer 1

0 = -16t^2 + 100 subtract 100 from each side

-100 = -16t^2 divide both sides by -16

100/16 = t^2 take the positive root of both sides

10/4 = t = 2.5 seconds

Hope this helps :)

Answer 2

Time taken 2.49 s

Step-by-step explanation:

Given

Initial Velocity u = 0 m/s

Height H = 100 ft

Solution

Using equation of motion

`H = ut + (1)/(2)gt^2\\\\100 = 0 + 0.5 * 32.2 * t^2\\\\t= 2.49 second`