Acheetah is walking at a speed of 1.15 m/s when it observes a gazelle 43.0 m directly ahead. if the cheetah accelerates at 9.25 m/s2, how long does it take the cheetah to reach the gazelle if the gazelle doesn't move?

2.93 s

Explanation:

Given that,

Initial speed of the Cheetah is,

distance has to be covered by Cheetah,

Acceleration of the Cheetah is,  

From the second equation of motion,

Therefore,

Therefore,

Now only consider positive value of t.

Therefore the time taken by Cheetah to reach the gazelle is 2.93 s.

an enlarged virtual image