A motor car is going due north at a speed of 50 km/h. It makes a 90⁰ left turn without changing the speed. The change in the velocity of the car is about

The increase in the speed of a car is proportional to the additional petrol put into the engine. Is it possible to accelerate a car without putting more petrol or less petrol into the engine?

Rain is falling vertically. A man running on the road keeps his umbrella tilted but a man standing on the street keeps his umbrella vertical to protect himself from the rain. But both of them keep their umbrella vertical to avoid the vertical sun-rays. Explain.

Figure (3-Q2) shows the displacement-time graph of a particle moving on the X-axis.

A particle has a velocity u towards east at
t = 0. Its acceleration is towards west and is constant. Let x_A and x_B be the magnitude of displacements in the first 10 seconds and the next 10 seconds