A car moves a distance of 200 m.  It covers the first-half of the distance at speed v. The  average speed is 48 km/h. Find the value of v. 

A train of 150 m length is going towards north direction at a speed of 10m/s.  A parrot flies at the speed of 5 m/s towards south direction parallel to the railways track.The time taken by the parrot to cross the train is 

A car is moving along a straight road with a uniform acceleration.  It passes through two points P and Q separated by a distance with velocity 30 km/h and 40 km/h respectively.  The velocity of the car midway between P and Q is

The resultant of × 0 will be equal to

If a car at rest accelerates uniformly to a speed of 144 km/h in 20 s, it covers a distance of

What will be ratio of the distance moved by a freely falling body from rest in 4^th and 5^th seconds of journey? 

A body falling from rest describes distances S₁, S₂ and S₃ in the first, second and third seconds of its fall.  The ratio of S₁ : S₂ : S₃ is 

A boat is sent across a river with a velocity of 8 km h^-1. If the resultant velocity of boat is 10 km h^-1 , then velocity of river is

A car travels for half of its time at 80 km/h and for the rest half time at 40 km/h.  Total distance covered is 60 km.  What is the average speed of the car?