Advertisements
Advertisements
प्रश्न
Show that gravity decreases at higher altitudes.
Advertisements
उत्तर
We know that the law of gravitation is
F = G ( m1 x m2)/R2
Here the F is the force due to attraction and this force is equal to the weight of the body m2g.
So m2g = G ( m1 x m2)/R2
g= (G x m2)/R2.
Here R is the distance between the earth centre and the object centre. Now if we go on higher altitude say ‘H’ then this R would increase to (R + H)
And the value of gravity at height H becomes
g’= (G x m2)/( R + H)2.
As denominator increases so g’ would be less than g and hence we can say that gravity decreases at higher altitudes.
APPEARS IN
संबंधित प्रश्न
Which of the Kepler’s laws of planetary motion led Newton to establish the inverse-square rule for gravitational force between two bodies ?
Can we apply Newton’s third law to the gravitational force ? Explain your answer.
The weight of an object is more at the poles than at the equator. Is it beneficial to purchase goods at equator and sell them at the pole? Does it matter whether a spring balance is used or an equal-beam balance is used?
A ball is thrown vertically upwards. It goes to a height 20 m and then returns to the ground. Taking acceleration due to gravity g to be 10 ms-2 , find :
the final velocity of the ball on reaching the ground .
Multiple Choice Question. Select the correct option.
The mass of earth is 6 × 1024 kg and radius of earth is 6.4 × 106 m. The magnitude of force between the mass of 1 kg and the earth is:
Who stated the law of gravitation?
A force can produce ________, In an object at rest. It can __________ an object and change its __________ of motion.
Two equal and opposite forces acting at the same point on a stationary body. Will the body move? Give reason to explain your answer.
Is there a gravitational attraction between you and the book? Explain.
Choose the wrong option.
