Measuring the Rate of Motion

A bus travels $110 \mathrm{km}/\mathrm{h}$ on an open highway. What is this speed in standard SI unit?

_____ is the physical quantity which changes continuously in a uniform circular motion.

Name the physical quantity which changes continuously in a uniform circular motion.

The distance traversed by a body in a particular direction in unit time is called -

Unit of speed in CGS system is _____.$\left(\mathrm{cm}/\mathrm{s}\right),\left(m/s\right)$.

Speed of a vehicle is measured by a device called _____.

For a body having initial velocity $u$ and final velocity $v$, average velocity =_____. ( Average of both/ product of both)

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.

What does an odometer measure? The odometer readings of a car are given below. Find its average speed during the interval.

A car travels from A to B with a speed of $40 \mathrm{km} {\mathrm{h}}^{-1}$ and returns back to the same point with a speed of $50 \mathrm{km} {\mathrm{h}}^{-1}$. Find its average speed over the journey.

Distinguish between speed and velocity.

Define average speed.

"Velocity of a body can never be greater than its speed." Comment.

The following table shows the data about motion of a car.

What is the average speed of the car?

Which of the following is moving faster and by how much, a car moving at $36 \mathrm{km} {\mathrm{h}}^{-1}$ or a bus moving at $400 \mathrm{m}$ per minute?

A cyclist takes one sound of a circular track of diameter $105 \mathrm{m}$ in $5 \mathrm{minutes}$. Find his speed. ($\mathrm{\pi }=\frac{22}{7}$)

A girl rides a bicycle and moves at $10 \mathrm{km} {\mathrm{h}}^{-1}$ for $2 \mathrm{h}$ and at $15 \mathrm{km} {\mathrm{h}}^{-1}$for next $3 \mathrm{h}$. Find the distance travelled and average speed.

Find the average speed of a bus if it moves from point A to B at a speed of $30 \mathrm{km} {\mathrm{h}}^{-1}$ and returns at a speed of $50 \mathrm{km} {\mathrm{h}}^{-1}$.

Give two differences between speed and velocity.