A body travels from a point P to point Q by the shortest route with a velocity of 50km/h and returns to P by the same route with a velocity of 70 km/h. What is the average speed ?

A car covers first half of the distance between two places at the speed of 40km/h . And 2nd half at 60km/h. What the average speed of the car ?

A car travels a distance A to B at a speed of 40km/h and returns to A at a speed of 30km/h (i)what is the average speed for the whole journey (ii)what is the average velocity ?

A body travels 50km east , then 120 km north and finally it comes back to the starting point through the shortest distance. Total time of journey is 3 hours. What is the average velocity in km/h , over the entire trip

A boy walks to his school at a distance of 6 km with constant speed 2.5(km)/h and walks back with constant speed of 4(km)/h . What is the average speed for the round trip in (km)/h

A car moving with a speed of 40 km/h be stopped by applying brakes after at least 2 m , if the same car is moving with a speed of 80km/h . What is the minimum stopping distance ?

A train moving with uniform acceleration has its front end passing a given fixed point P with a speed u and the tail end passing the same point P with a speed v . What is the speed of the mid -point of the train when passing the point ?

A body moving with uniform acceleration has velocity of 20m/s and 30 m/s when passing point P with Q in its path . Find its velocity at the point midway between P and Q .

Starting from the rest , a body P travels with a uniform acceleration of 4m/s^2 and starting from rest from the same point 4s later , a body Q travels with a uniform acceleration of 16m/s_2 in the same direction as P . Find when and where they meet .