question_answer

A stone is thrown vertically upwards and then it returns to the thrower. Is it a projectile? Explain.

Answer:

                To study the motion of a projectile, we assume that (i) there is no frictional resistance of air. (ii) The effect due to rotation of earth and curvature of the earth is negligible. (iii) The acceleration due to gravity is constant in magnitude and direction at all points of the motion of projectile.