# CHAPTER-8:  GRAVITATION

1. Kepler’s First Law is known as-

• Law of orbits
• Law of areas
• Law of periods
• None of these.
Law of orbits

2. Kepler’s second law is known as-

• Law of orbits
• Law of periods
• Law of areas
• None of these.
Law of areas

3. Kepler’s Second Law is a consequence of-

• Conservation of energy
• Conservation of linear momentum
• Conservation of angular momentum
• Conservation of mass.
Conservation of angular momentum

4. Which of the following Kepler’s Law is known as Harmonic Law?

• Second Law
• First Law
• Third Law
• None of these.
Third Law

5. S. I. unit of “G’ is-

• Nm⁻²Kg⁻²
• NmKg⁻²
• Nm⁻²Kg
• Nm²Kg⁻²
Nm²Kg⁻²

6. Gravitational force depends on-

• Electric charge
• Mass
• Electric Current
• None of these
Mass

7. Dimensional formula of gravitational constant is-

• [M⁻¹L³T⁻²]
• [M³L³T⁻³]
• [M³L³T³]
• [LT⁻³]
[M⁻¹L³T⁻²]

8. The value of acceleration due to the gravity of the earth –

• 98 m/s²
• 0.98 m/s²
• 9.8 m/s²
• 0.098 m/s²
9.8 m/s²

9. Value of ‘g’ is-

• maximum at poles
• maximum at the equator
• same everywhere
• maximum at the center of the earth.
maximum at poles

10. If we go down from the earth’s surface, the value of acceleration due to gravity (g)-

• decreases
• remains constant
• increases
• None of these
decreases

11. The escape velocity does not depend upon-

• mass of the body
• height of the location from where it is projected
• the density of the body
• None of these.
mass of the body

12. The time period of a simple pendulum in a satellite is-

• Same on the earth
• Zero
• Infinite
• None of these
Infinite

13. The weight of a body at the center of the earth is-

• Zero
• Infinite
• Same as on the surface of the earth
• None of these 