Question
Distinguish between:
Universal gravitational constant - Gravitational acceleration of earth.
Universal gravitational constant - Gravitational acceleration of earth.
✓
Answer
| Sr.no. | Universal gravitational constant | Gravitational acceleration of earth |
| 1. | The gravitational force acting between unit masses kept at a unit distance away from each other equals gravitational constant (G). | The acceleration produced in a body under the influence of the force of gravity alone is called gravitational acceleration of earth or acceleration due to gravity (g). |
| 2. | Gravitational constant is a scalar quantity. | Acceleration due to gravity is a vector quantity. |
| 3. | The value of a gravitational constant is a constant. | The value of acceleration due to gravity varies with height, depth and shape of the earth. |
| 4. | The value of $G = 6.67 \times 10^{-11} Nm^2/kg^2.$ | The value of $g = 9.8 m/s^2 $on earth’s surface. |
| 5. | Gravitational constant is never zero anywhere. | Acceleration due to gravity is zero at the centre of the earth. |
| 6. | The S.I. unit of gravitational constant is $Nm^2/kg^2$ | The S.I. unit of acceleration due to gravity is $m/s^2.$ |
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Question
(i) What are the masses of the objects shown?
(ii) What is the distance between their centres?
(iii) Write gravitational force between them.
(iv) Why gravitation constant is called universal constant?
(v) What will happen to gravitational force if mass of one of the objects is doubled?
(vi) What is the value of universal constant in SI?
Question
(i) What are the masses of the objects shown?
(ii) What is the distance between their centres?
(iii) Write gravitational force between them.
(iv) Why gravitation constant is called universal constant?
(v) What will happen to gravitational force if mass of one of the objects is doubled?
(vi) What is the value of universal constant in SI?