Gravitation Tes...

What will be the ratio of a distance moved by a freely falling body from rest in $${ 4 }^{ th }$$ and $${ 5 }^{ th }$$second of journey

An isosceles triangle of base $$3\ m$$ and altitude $$6\ m$$, is immersed vertically in water having its axis of symmetry horizontal as shown in the figure. If height of water on its axis is $$9\ m$$, the total thrust on the plate is

Which of the following can be used for measuring the weight of an object?

At the surface of a certain planet acceleration due to gravity is one-quarter of that on the earth. If a brass ball is transported to this planet, then which one of the following statements is not correct?

A body of mass $$m$$ is taken to the bottom of a deep mine. Then

A rectangular plate$$(2\ m\times 3\ m)$$ is immersed in water in such a way that its greatest and least depth are $$6\ m$$ and $$4\ m$$ respectively from the water surface. The total thrust on the plate is:

Which of the following statements about the gravitational constant is true

Which of the following is an application of Archimedes' principle?

If the force of gravity suddenly disappears:-

Why do hot air ballons rise and float mid-air?