MEDIUM
9th CBSE
IMPORTANT
Earn 100

State universal law of gravitation. Write the expression for the gravitational force between the earth and an object lying on the surface of the earth.

Important Questions on Gravitation

EASY
9th CBSE
IMPORTANT
Calculate the gravitational force between two iron balls each of mass 1 kg separated by a distance of 1 m. (Given G=6.673×10-11 N m2 kg-2)
EASY
9th CBSE
IMPORTANT
Find the distance between two stones each of mass 2 kg so that the gravitational force between them is 1 N.
MEDIUM
9th CBSE
IMPORTANT
A stone is dropped from the edge of a roof. Find the speed of the stone at 2 s after the stone was dropped. (Take g = 9.8 m/s2)
EASY
9th CBSE
IMPORTANT
A stone is dropped from the edge of a roof. Find the distance travelled by the stone in 2 s after its release. (Take g = 9.8 m/s2)
EASY
9th CBSE
IMPORTANT
A ball is thrown upward with a speed of 10 m s-1. Calculate the speed of the ball after 1 second. (Take g = 9.8 m/s2)
MEDIUM
9th CBSE
IMPORTANT
A ball is thrown upward with a speed of 15 m s-1. Find the distance travelled by the ball in 2 s. (Take g = 9.8 m/s2)
MEDIUM
9th CBSE
IMPORTANT
A body weighs 30 N on the surface of the earth. How much will it weigh on the surface of moon? Given gmoon=16×gearth.
MEDIUM
9th CBSE
IMPORTANT
Define the terms "mass" and "weight". Write their SI units. Distinguish between mass and weight.