If a cheetah spots his prey at a distance of 100m, what is the minimum time it will take to get its prey if the average velocity attained by it is 90 km/h?

A cheetah is the fastest land animal and can achieve a peak velocity of 100 km//h upto distances less than 500 m. If a cheetah spots his prey at a distance of 100 m. What is the minimum time it will take to get its prey, if the average velocity attained by it is 90 km//h .

A car moving along a straight highway with speed of 126 km h^-1' is brought to a stop within a distance of 200 m. What is the retardation of the car (assumed uniform), and how long does it take for the car to stop ?

A train 100 m long is moving with a velocity of 60 kmh^-1 . Find the time it takes to cross the bridge 1 km long.

The driver of a three-wheeler moving with a speed of 36 km//h sees a child standing in the middle of the road and brings his vehicle to rest in 4.0 s just in time to save the child. What is the average retarding force on the vehicle ? The mass of the three-wheeler is 400 kg and the mass of the driver is 65 kg.