Class 10 Science

Multiple Choice Questions (10 × 1 = 10 Marks)

1. What is the SI unit of gravitational constant (G)?
a) N m²/kg²
b) N/kg
c) m/s²
d) kg/m²

2. The value of acceleration due to gravity (g) on the surface of the Earth is approximately:
a) 9.8 m/s²
b) 6.67 × 10⁻¹¹ m³/kg.s²
c) 1.6 m/s²
d) 3 × 10⁸ m/s

3. Which of the following statements is correct?
a) Gravitational force acts only on large bodies
b) Gravitational force acts between all objects with mass
c) Gravitational force does not depend on mass
d) Gravitational force does not exist in space

4. The acceleration due to gravity on the Moon is:
a) Equal to that on Earth
b) More than that on Earth
c) About 1/6th of Earth’s gravity
d) About twice that of Earth

5. A body in free fall experiences:
a) Increasing mass
b) Zero acceleration
c) Zero weight
d) Decreasing velocity

6. What happens to the weight of an object when taken to the Moon?
a) Increases
b) Decreases
c) Remains the same
d) Becomes zero

7. The value of G was determined by:
a) Newton
b) Galileo
c) Cavendish
d) Kepler

8. The weight of an object is given by:
a) W = mg
b) W = m/g
c) W = g/m
d) W = Gm²

9. When an object is in free fall, which force is acting on it?
a) Frictional force
b) Magnetic force
c) Gravitational force
d) Electromagnetic force

10. The acceleration due to gravity is:
a) The same everywhere on Earth
b) Zero at the equator
c) Different at poles and equator
d) Maximum at the equator

Madhesh Province (science and technology)
PC: AK Raj