Advertisements
Advertisements
प्रश्न
If the moon attracts the earth, why does the earth not move towards the moon?
Advertisements
उत्तर
- The Earth and the Moon are attracted to each other with the same power.
- However, Newton's second equation of motion states that the acceleration produced by any force in a body is inversely proportional to its mass.
- The Earth's acceleration is insignificant because its mass is far greater than that of the moon. As a result, it looks that the Earth is not moving towards the Moon.
संबंधित प्रश्न
State two applications of universal law of gravitation.
Four particles having masses m, 2m, 3m and 4m are placed at the four corners of a square of edge a. Find the gravitational force acting on a particle of mass m placed at the centre.
A uniform metal sphere of radius a and mass M is surrounded by a thin uniform spherical shell of equal mass and radius 4a (In the following figure). The centre of the shell falls on the surface of the inner sphere. Find the gravitational field at the points P1 and P2 shown in the figure.
The gravitational field in a region is given by \[E = \left( 2 \overrightarrow{i} + 3 \overrightarrow{j} \right) N {kg}^{- 1}\] . Show that no work is done by the gravitational field when a particle is moved on the line 3y + 2x = 5.
[Hint : If a line y = mx + c makes angle θ with the X-axis, m = tan θ.]
How will the force of gravitation between two objects change if the distance between them is:
Almost zero
Explain the difference between g and G.
Mahendra and Virat are sitting at a distance of 1m from each other. Their masses are 75 kg and 80 kg respectively. What is the gravitational force between them? (G = 6.67 × 10−11 Nm2/kg2)
Shown are several curves (Figure). Explain with reason, which ones amongst them can be possible trajectories traced by a projectile (neglect air friction).
Complete the chart below.
| F(N) | M1(kg) | M2(kg) | D(m) |
| (a) | 50 | 84 | 02 |
| 16 × 109 | 1.63 × 1022 | (b) | 34 |
Who measured the value of the Universal Gravitational Constant G using the Cavendish balance?
