Last seen: Nov 14, 2021
The weight of an object on the moon is about one-sixth of its weight on the earth. This is because the value of acceleration due to gravity on the moo...
The mass of a body is more fundamental because mass of a body is constant and does not change from place to place.
(i) Its mass will be 20 kg as mass is a constant quantity. (ii) Weight, W = m x g = 20 x 1.6 = 32N
Weight of the stone = Gravitational force acting on it = 20 N Weight, W = m x g 20 = m x 10 m = 2 kg
Weight = 9.8 N W = m x g 9.8 = m x 9.8 m = 1kg Force, F = mass x acceleration 20 N = 1 kg x a Acceleration, a = 20 m/s2
Yes, weight of a body is not constant, it varies with the value of acceleration due to gravity, g. Weight of a body is zero, when it is taken to th...
Mass: (i) The mass of an object is the quantity of matter contained in it. (ii) SI unit of mass is kilogram (kg). (iii) The mass of an object is...
Initial velocity, u = ? Final velocity, v = 0 Acceleration due to gravity, g = -10m/s2 Height, h = 5 m (a) For a freely falling body: v2...
Initial velocity, u = 20 m/s Final velocity, v = 0 Acceleration due to gravity, g = -9.8 m/s2 Height, h = ? Using relation, for a freely fa...
Height, s = 20 m Initial velocity, u = 0 Acceleration due to gravity, g = 10 m/s2 Final velocity, v = ? Time taken, t = ? (i) Using rela...
Initial velocity, u = 0 m/s Acceleration due to gravity, g = 9.8 m/s2 Time taken to reach the ground, t = 2.5 sec Height, h = ? Using relat...
Initial velocity of the stone, u = ? Final velocity of stone, v = 0 Acceleration due to gravity, g = -9.8 m/s2 Time, t = 3 sec Using relati...
Distance d = 1.5 x 108km = 1.5 x 1011 m Mass of the sun, m = 2 × 1030 kg Mass of the earth, M = 6 x 1024 kg Force of gravitation, F = F = 6.7...
Force due to gravity, F = F = 6.7 x 10-11 x F = 1472 N
F = m = 50 kg M = 120 kg Distance, d = 10 m G = 6.7 x 10-11 Nm2 kg-2 F = 6.67 x 10-11 x F = 6.67 x 60 x 10-11 F = 4.02 x 10-9 N
This is because the earth exerts a force of attraction (called gravity) on the stone and pulls it down.
(i) Universal law of gravitation is used to determine the masses of the sun, the earth and the moon accurately. (ii) Universal law of gravitation h...
(a) If we double the distance between two bodies, the gravitational force becomes one-fourth. (b) If we halve the distance between two bodies, then...
The gravitational force F between two bodies of masses M and m kept at a distance d from each other is F = The force between two bodies is invers...
The force of gravitation between two bodies is directly proportional to the product of their masses. F ∝ m x M Since the mass of cricket balls is ...