Kerala (English Medium) Std 9 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
Name the fundamental force which holds the planets in their orbits around the sun:

(A) Gravitational force of attraction	(B) Electrostatic force of attraction
(C) Nuclear force of attraction	(D) None of these

Question-2
For a freely falling body (falling vertically down wards) 'g' is

(A) Negative	(B) Positive
(C) Zero	(D) None of these

Question-3
Force of gravitation is

(A) Always the force of attraction	(B) Always the force of repulsion
(C) Either attraction or repulsion	(D) None of these

Question-4 What is the acceleration of a meteor passing by the earth at an altitude of 55000 km?

(A) 0. 11m/s²	(B)11 m/s²
(C)1. 11 m/s²	(D)5. 18 m/s²

Question-5
The weight of a body of mass 5 kg is

(A) 69.0 N	(B) 79.0 N
(C) 49.0 N	(D) 39.0 N

Question-6 The radius of the earth is 6400 km.What is its mass?

(A) 6.0 × 10²⁴ kg	(B)5. 0 × 10²⁴kg
(C)1.0× 10²²kg	(D)6.5 × 10¹⁴ kg

Question-7
Every object has a point where all its weight is considered to be concentrated, this point is called

(A) Acceleration due to gravity	(B) Midpoint
(C) Gravitational force	(D) Centre of gravity

Question-8
The acceleration due to gravity is zero at

(A) The equator	(B) The poles
(C) The sea level	(D) The centre of the earth

Question-9
Satellites whose period of revolution is 24 hours are called

(A) Geostationary satellites	(B) Polar satellite
(C) Equatorial satellite	(D) Artificial satellite

Question-10
What will be the weight of an object at the centre of the earth ?

(A) Half	(B) Zero
(C) Doubles	(D) No change

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Std 9

Kerala (English Medium)

Practice in Related Chapters
Magnetism and Electricity
Motion
Refraction of Light
Gravitation
Work,Energy and Power
Electricity
Wave Motion
Forces of Fluids