MEDIUM
9th CBSE
IMPORTANT
Earn 100

Gravitational force on the surface of the moon is only 16 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?

Important Questions on Gravitation

HARD
9th CBSE
IMPORTANT
A ball is thrown vertically upwards with a velocity of 49 m/s. Calculate (Take g=9.8 m/s2)
(i) the maximum height to which it rises,
(ii) the total time it takes to return to the surface of the earth.
HARD
9th CBSE
IMPORTANT
A stone is released from the top of a tower of height 19.6 m. Calculate its final velocity just before touching the ground.(Take g=9.8 m/s2)
HARD
9th CBSE
IMPORTANT
A stone is thrown vertically upward with an initial velocity of 40 m/s. Taking g=10 m/s2, find the maximum height reached by the stone. What are the net displacement and the total distance covered by the stone?
MEDIUM
9th CBSE
IMPORTANT
Calculate the force of gravitation between the earth and the Sun, given that the mass of the earth = 6×1024 kg and of the Sun = 2×1030 kg. The average distance between the two is 1.5×1011 m and the gravitational constant is G = 6.7 × 10-11 N m2kg-2.
HARD
9th CBSE
IMPORTANT
A stone is allowed to fall from the top of a tower 100 m high and at the same time, another stone is projected vertically upwards from the ground with a velocity of 25 m/s. Calculate when and where the two stones will meet. (Use  g = 10 m/s2)
MEDIUM
9th CBSE
IMPORTANT

A ball thrown up vertically returns to the thrower after 6 s. (Use g = 10 m/s2)Find
(a) the velocity with which it was thrown up,
(b) the maximum height it reaches, and
(c) its position after 4 s.

EASY
9th CBSE
IMPORTANT
In what direction does the buoyant force on an object immersed in a liquid act?
EASY
9th CBSE
IMPORTANT
Why does a block of plastic released under water come up to the surface of the water?