Speed

A bus travelling the first one third distance at a speed of  $10 \mathrm{km} {\mathrm{h}}^{-1}$, the next one third at  $20 \mathrm{km} {\mathrm{h}}^{-1}$ and the last one – third at  $60 \mathrm{km} {\mathrm{h}}^{-1}$. The average speed of the bus is

How to convert $\mathrm{m}/\mathrm{s}$ to $\mathrm{km}/\mathrm{h}$?

How does a light gate work to measure speed?

How to calculate speed using light gate?

For ${\left(\frac{1}{m}\right)}^{th}$of the distance between two stations, a train is uniformly accelerated then moves with uniform velocity for some time and for ${\left(\frac{1}{\mathrm{n}}\right)}^{\mathrm{th}}$of the distance, it is uniformly retarded. It starts from rest at one station and comes to rest at another station. Find the ratio of its maximum velocity to its average velocity.

A particle starts from rest with zero initial acceleration. The acceleration increases uniformly with time.Find the time average and distance average of velocity up to a certain instant when the velocity becomes $\mathrm{v}$.

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

A car travels from point $A$ to point $B$ at a speed $40 \mathrm{km} {\mathrm{h}}^{-1}.$ The car then returns from $B$ to $A$ at a speed $60 \mathrm{km} {\mathrm{h}}^{-1}.$ The average speed for the round trip is:

Given $\overrightarrow{A}=2\hat{i}+3\hat{j}$ and $\overrightarrow{B}=\hat{i}+\hat{j}$. The magnitude of component of vector $\overrightarrow{A}$ along vector $\overrightarrow{B}$ is

Find $\frac{v_{\mathrm{rms}}}{v_{\mathrm{avg}}}$ of a molecule whose speed in three different environments are $\frac{1}{2} \mathrm{km} {\mathrm{s}}^{-1}\text{,} 1 \mathrm{km} {\mathrm{s}}^{-1}\text{,} 2 \mathrm{km} {\mathrm{s}}^{-1}$,

The speed of a moving object is determined to be $0.06 \mathrm{m} {\mathrm{s}}^{-1}$. This speed is equal to:

Find the ratio of average speed $\left(v_{\mathrm{avg}}\right)$ of oxygen molecule to root-mean-square speed $\left(v_{\mathrm{rms}}\right)$ of nitrogen molecule at the temperature $T$:

For a moving particle, which of the following options may be correct ?

Here, $V_{av}$ is average velocity and $v_{av}$ the average speed. 

Starting from rest a particle is first accelerated for time $t_1$ with constant acceleration $a_1$ and then stops in time $t_2$ with constant retardation $a_2$. let $v_1$ be the average velocity in this case and $s_1$ the total displacement. In the second case it is accelerating for the same time $t_1$ with constant acceleration $2a_1$ and come to rest with constant retardation $a_2$ in time $t_3$. If $v_2$ is the average velocity in this case and $s_2$ the total displacement, then 

A body moving along a straight line travels one third of the total distance with a speed of $3.0\mathrm{ }\mathrm{m}\mathrm{ }{\mathrm{s}}^{-1}$. The remaining distance is covered with a speed of $4.0\mathrm{ }\mathrm{m}\mathrm{ }{\mathrm{s}}^{-1}$ for half the time and $5.0\mathrm{ }\mathrm{m}\mathrm{ }{\mathrm{s}}^{-1}$ for the other half of the time. The average speed during the motion is

A runner starts from $O$ and goes to $O$ following path $OQRO$ in $1hr.$ What is net displacement and average speed?

What will be ratio of speed in first two seconds to the speed in next 4s?

A motorist travels to a place $150 \mathrm{km}$ away at an average speed of $50 \mathrm{km} {\mathrm{hr}}^{-1}$ and returns at $30 \mathrm{km} {\mathrm{hr}}^{-1}$. his average speed for the whole journey in $\mathrm{km} {\mathrm{hr}}^{-1}$ is :