Gravitation Tes...

There are two planets A and B. The mass of planet A is three times to that of planet B and the radius of planet A is two times to that of planet B. What is the ratio of their acceleration due to gravity?

What will be acceleration due to gravity, if the mass of a planet is tripled and radius is halved?

A planet has twice the values of mass and radius of earth. What will be the acceleration due to gravity on the surface of the planet?

If a body of mass `m` is taken to the bottom of a deep mine, then

At what altitude would the acceleration due to gravity above the earth`s surface be half of its value on the surface of the earth?
(Take R = 4000 miles)

A ball is released from a height and it reaches the ground in 6 s. What is the velocity with which the ball will strike the ground?
(Take g = 9.8 ms^-2)

A car falls off a ledge and drops to the ground in 0.8 s. How high is the ledge from the ground?
(Take g = 10 ms^-2)

A ball is dropped from a height of 20 m above the ground. What is the time taken by the ball to reach the ground?
(Take g = 10 ms^-2)

A force of 40 N is applied on a nail, whose tip has an area of cross-section of 0.001 cm^2.

Calculate the pressure on the tip.