A car travels 40 km east in 1 hour and then 30 km north in the next 0.5 hours. What is its average speed?

A car travels 20 km east and then 10 km west in 2 hours. What is its average speed?

A Body moves 6 m north. 8 m east and 10 m vertically upwards, what is its resultant displacement from initial position

A particle moves along a semicircular path of radius $R$ in time $T$. If it returns to its starting point along the diameter in time $T/2$, what is the magnitude of the average velocity for the entire journey?

Two boys are standing at the ends A and B of a ground where AB=a. The boy at B starts running in a direction perpendicular to AB with velocity ${v_1}$. The boy at A starts running simultaneously with velocity v and catches the other boy in a time t, when t is

An aeroplane files 400 m north and 300 m south and then files 1200 m upwards then net displacement is

A body covers one-third of its journey with speed 'u', the next one-third with speed 'v', and the last one-third with speed 'w'. What is its average speed for the entire journey?

A particle moves along a spiral path given by $r = at$, $heta = bt$, where $a$ and $b$ are constants and $t$ is time. What is the magnitude of average velocity from $t=0$ to $t=T$?

Two trains are moving with equal speed in opposite directions along two parallel railway tracks.

If the wind is blowing with speed ‘u’ along the track so that the relative velocities of the trains with respect to the wind are in the ratio $1:2$ then the speed of each train must be

A car moves a distance 200 m. It covers first half of the distance at speed $60\,\,km{h^{ - 1}}$ and the second half at speed v. If the average speed is $40\,\,km{h^{ - 1}}$. The value of v is

The co-ordinates of a body moving in a planet at any instant of time $t$ are $x = \alpha {t^2}$ and $y = \beta {t^2}$ The speed of the body is