Question

Part 1: (Question 1 of 2)
A cheetah can run at a maximum speed 90.5 km/h and a gazelle can run at a maximum speed of 74.7 km/h. If both animals are running at full speed, with the gazelle 82.9 m ahead, how long before the cheetah catches its prey


Part 1 answer: cheetah will catch its prey in 18.92 sec or simply 19 seconds

Part 2: (Question 2 of 2)

The cheetah can maintain its maximum speed for only 7.5 s. What is the minimum distance the gazelle must be ahead of the cheetah to have a chance of escape? (After 7.5 s the speed of cheetah is less than that of the gazelle.) Answer in units of m.

Answer 1

Answer:

You must know the concept of relative velocity. Relative velocity is the velocity of the cheetah wrt to the gazzele. Refer to the above photo.

Hope you will be able to understand.