A car movies at a constant speed of 60 km `hr^-1` for half of the journey and 80 km `hr^-1` for remaining half of the journey. Find the average speed of the car in one hour.

A car travels at a speed of 50 km/hr for 30 minutes, at 30 km/hr for next 15 minutes and then 70 km/hr for next 45 minutes. What is the average speed of the car?

A car travels at a speed of 50 km//hr for 15 minute and then 70 km//hr for next 45 minutes. What is the average speed of the car?

A body covers one-half of its journey at 40 m s^-1 and the next half at 50 m s^-1 . Its average velocity is.

A body covers one-half of its journey at 40 m s^-1 and the next half at 50 m s^-1 . Its average velocity is

A bus travel its onward journey with a constant speed of 30km//hr and its return journey with a constant speed of 60km//hr .the average speed for its entire journey is A. 90 k m / h r B. 45 k m / h r C. 40 k m / h r D. 15 k m / h r

A car moves at speed of 36 km hr^-1 on a level road. The coefficient of friction between the tyres and the road is 0.8 . The car negotiates a curve of radius R. IF g=10 ms^-2 , then the car will skid (or slip) while negotiating the curve if the value R is

Out of 1900 km,Vishal travelled some distance by bus and some by aeroplane. Bus travels with average speed 60km/hr and the average speed of aeroplane is 700 km/hr.It takes 5 hours to complete the journey. Find the distance travelled by Vishal in bus.

A train covers the first half of the distance between two stations at the speed of 40 km h^-1 and the other half 60 km h^-1 . Its average speed is

A car moves in a circle at the constant speed of 50m//s and completes 1 revolution in 40s. Determine the magnitude of acceleration of the car.