Measuring the Rate of Motion

A car travels $100 \mathrm{km}$ at a speed of $60 \mathrm{km} {\mathrm{h}}^{-1}$ and returns with a speed of $40 \mathrm{km} {\mathrm{h}}^{-1}$. Calculate the average speed for the whole journey.

A boy walks from his classroom to the bookshop along a straight corridor towards North. He covers a distance of $20 \mathrm{m}$ in $25$ seconds to reach the bookshop. After buying a book, he travels the same distance in the same time to reach back in the classroom. Find (a) average speed and (b) average velocity of the boy.

Which of the following is the vector quantity? 

Choose the correct statement from the given sentences.

The total length of the path covered by a moving object is called _____.

Which of the following statements is correct? 

Which of the following statements is correct? 

In which of the following cases of motions, the distance moved and the magnitude of displacement are equal?

The numerical ratio of displacement to distance for a moving object is :

A body is thrown vertically upward with velocity u, the greatest height h to which it will rise is given by the formula

A particle is moving in a circular path of radius r. The displacement after half a circle would be

An artificial is moving in a circular orbit of radius 42250 km. Calculate its speed if it takes 24 hrs to revolve around the earth. 

A train $120 \mathrm{m}$ long moving on a straight and level track with uniform speed passes a pole in $6$ seconds. Find: the time it will take to cross a $50 \mathrm{m}$ long bridge.

Which of the following statement is correct regarding velocity and speed of a moving body?

The velocity of a bus is 18 m/s. Express this in km/h.