Question

(a) Which is greater, the attraction of the earth for 1 kg of iron or the attraction of 1 kg iron for
the earth? Why?
(b) A boy throws a ball vertically upwards and catches it back in 10 s. Calculate
(i) the velocity with which it was thrown up and
(ii) maximum height attained by the ball. (Take g = 10 m/s2)

Answer 1

Answer:

Gravitation. Which is greater, the attraction of the earth for 1 kg of iron or attraction of 1 kg of iron for the earth? Both the attractions are equal in magnitude because mass of the earth is the same for both attractions.