Starting from rest, a car moves with a uniform acceleration of 0.5 m/s2. What will be the velocity of the car after 20 s?

In a running race, a boy starts from rest and reaches a velocity of 60 m/s in 5 minutes. If the acceleration is uniform, the acceleration and distance covered by the boy during this period are, respectively:

A stone falls freely and covers a distance (s) of 20 m in time (t) of 2.0 s. What is the value of acceleration due to gravity (g)?