Explanation
No gravity in space , so spring will not be extended.
Since mass M of the bodies is same, so gravitational force is also same.
The gravitational attraction on a body due to earth decreases with height and increased due to moon. At a certain height, it becomes zero and with further increase in height, the gravitational attraction of moon becomes more than that of earth.
The body can be fired at any angle because the energy is sufficient to take the body out of the gravitational field of earth.
Since there is no atmosphere in the neighbourhood of spaceship in the sky, so no scattered light can come to the astronaut. Hence the sky appears pitch dark.
The working of jet engine is based on the law of conservation of linear momentum.
Gravitation supports Newton’s third law of motion
The system will be bound at all those points where the total energy = (EP + EK) is negative. In the given curve, at points A, B and C, the EP > EK.
g1 = g ‒ ω2R Cos2λ Rotation of the earth results in the decreased weight apparently.this decrease in weight is not felt at the poles as the angle of latitude is 90’
mass does not vary from place to place
g α ρ
g α ρR
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