A ball is thrown vertically upwards with a velocity of 49 m/s. Calculate
(i) the maximum height to which it rises,
(ii) the total time it takes to return to the surface of the earth.
(i) In Cartesian sign convention, upward velocity is taken positive and acceleration due to gravity is taken negative.
Gravitational force on the surface of the moon is only 1/6 as strong as gravitational force on the earth. What is the weight in newtons of a 10 kg object on the moon and on the earth? What is its mass on each?
Amit buys few grams of gold at poles as per the instruction of one of his friends. He hands over the same when he meets him at equator. Will the friend agree with the weight of gold bought? If not, why?
What do we call the gravitational force between the earth and an object?
Why will a sheet of paper fall slower than one that is crumpled into a ball?
