Question

Sam is pulling a box up to the second story of his apartment via a string. The box weighs 16.5 kg and starts from rest on the ground. Sam is pulling so that the velocity of the box is increasing by 2.6 m/s every second.

How long until the box reaches a height of 13.2 m?

Answer 1

3.19 s

Step-by-step explanation:

We know,

s = ut + ( 1/2 * a * t^2 )

13.2 = 0*t + ( 1/2 * 2.6 * t^2 )

t^2 = 13.2/1.3 = 10.1538

t = 3.19