A boy hits a football high up into the air. He runs and catches the football before it hits the ground. Which of the two, the boy or the football has had greater displacement ?

The speed$-$time graph of a body is a straiaht line parallel to time axis. The body has

Prove that if a body is thrown vertically upward, the time of ascent is equal to the time of descent.

If the average velocity of a body is equal to mean of its initial yelocity and final velocity, then the acceleration of the body is

The average time taken by a normal person to react to an emergency is one$-$fifteenth of a second and is called the 'reaction time'. If a bus is moving with a velocity of $60\, km h^{-1}$ and its driver sees a child running across the road, how much distance would. the bus had moved before he could press the brakes ? The reaction time of the people increases when they are intoxicated. How much distance had the bus moved if the reaction time of the driver were $\frac{1}{2}\, s$ under the influence of alcohol ?