A frog leaps up from the ground and lands on a step 0.1 m above the ground 2 s later. We want to find the
vertical velocity of the frog at the moment that it left the ground. We can ignore air resistance,
Which kinematic formula would be most useful to solve for the target unknown?

chose from the answers i. the picture

Explanation:

To solve this problem, we can use the following suvat equation:

where

is the vertical displacement of the frog

is the initial vertical velocity

t is the time

a is the acceleration

We have chosen this formula because apart from , all the other quantities are known. In fact:

is the vertical displacement

t = 2 s is the total time of flight

is the acceleration due to gravity (negative because it is downward)

Therefore, solving for , we find the initial velocity of the frog:

what was the answer?

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