Question

If you jump upward with a speed of 2.40 m/s, how long will it take before you stop rising? Use g=9.81 m/s².

T =

Answer 1

Step-by-step explanation:

so, we want to track the velocity of you when jumping, and check when your velocity will be 0.

v = u + at

v is the velocity, u is the initial velocity, a is the acceleration

we check for what t do you get v = 0.

so,

0 = 2.4 - 9.81t

we need to use the negative acceleration, because the initial movement and the acceleration are pushing in opposite directions.

9.81t = 2.4

t = 2.4/9.81 = 0.244648318... s

it will take 0.244648318... seconds (almost 1/4 second) for you to come to a complete stop (and start falling back to the ground).