Question

CHAPTER-10
7. If the moon attracts the earth, why does the Earth not move towards the moon?
8. Gravitational force on the surface of the moon is only 1/6 as strong as gravitational force on the
earth. What is the weight in newtons of a 10kg object on the moon and on the earth?
9. A stone is released from the top of a tower of height 19.6m. Calculate its final velocity just before
touching the ground.
10. Calculate the force of gravitation between the Earth and the Sun, given that the mass of the earth
6x1024 kg and of the Sun=2x1030kg. The average distance between the two is 1.5x 10"m.



yeah sabka answer dona
kal paper hai ​

Answer 1

Answer:

1.) The moon attracts the earth with the same gravitational force as the earth attracts the moon. ... Since the mass of earth is very large, the acceleration produced is negligible. Therefore, the earth does not move towards the moon.

2) Weight = mass of object × acceleration due to gravity

W = m × g

For earth g = 9.8 m/s^2

For moon gravity is about 1/6 part of what we have on earth so g for moon is about = 9.8/6 that is about 1.63 m/s^2

So weight of the object on earth:

W = 10 × 9.8 = 98 Newton

And weight of that object on moon:

W = 10 × 1.63 = 16.3 Newton

3) Initial velocity u = 0

Acceleration, a = g = 9.8 m s-2

Distance travelled, s = 19.6 m

Let the final velocity be v

According to the third equation of motion

v²-u²=2as

v²-0²= 2×9.8×19.6

v² = (19.6)²

v = 19.6m/s

4) last question nhi aata