During night what is the direction of movement of air ?

What is the cause of movement of wind ?

What is the chemical compostition of air ?

what is the percentage of nitrogen in the air?

A player throws a ball upwards with an initial velocity u.What is the direction of accdeleration during the upward motion of the ball?

What is air ?

Read each statement below carefully, and state, with reasons, if it is true or false :- During rolling, the force of friction acts in the same direction as the direction of motion of the CM of the body.