Ch. 10 Gravitation
Ch.10 - Gravitation Q1. How does the force of gravitation between 2 objects change when the distance between them is reduced to half? A1. The masses of the 2 objects are M and m Distance = r/2 Force = GMm/ (r/2)^2 = GMm/ (r^2/4) = 4GMm/ r^2 Q2. Gravitational force acts on all objects in proportion to their masses. Why then a heavy object does not fall faster than a light object? A2. The acceleration on the objects does not depend on their masses. The acceleration due to gravity is same on all objects. Thus ideally, a heavy object and light object fall at the same time, but in real life situations, heavy objects fall faster due to the variation in the effect of air resistance on a heavy object and a light object. Q4. The earth and the moon are attracted to each other by gravitational force. Does the earth attract the moon with a force that is greater or smaller or the same as th