Online test of Chapter 10 Gravitation 3 Science| Class 9th

Questions :

1. The mass of an object is 60 kg on the earth. This object was carried to the moon. The mass of the body on the moon will be
(a) 6 kg.
(b) 60 kg.
(c) 10 kg.
(d) 360 kg.

2. The weight of a 1 kilogram mass body on the earth will be
(a) 1 N.
(b) 9.8 N.
(c) 0.
(d) 100 N.

3. What is the direction of centripetal force on an object moving with constant speed in a circular track?
(a) Towards Centre
(b) Outwards Centre
(c) Tangential direction
(d) May Be (a) or (b)

4. The ratio of the weight of a body on the moon to the weight of the same body on the earth is
(a) 1/8.
(b) 1/6.
(c) 1/12.
(d) 1/3.

5. Two particles are kept at a separation r. The gravitational force between them is proportional to:
(a) r
(b) r2
(c) 1/r
(d) 1/r2

6. The equation F = Gm1m2/r2 is valid for:
(a) Rectangular bodies
(b) Circular bodies
(c) Elliptical bodies
(d) Spherical bodies.

7. The force of gravitation between two bodies of mass 1 kg each kept at a distance of 1 m is:
(a) 6.67 N
(b) 6.67 × 10-9 N
(c) 6.67 × 10-2 N
(d) 6.67 × 10-11 N

8. A coin and a feather are dropped together in a vacuum:
(a) the coin will reach the ground first n
(b) the feather will reach the ground first
(c) the feather will not fall down n
(d) both the bodies will reach the ground together.

9. The SI unit of thrust is
(a) Newton
(b) Pascal
(c) Newton meter
(d) Newton/meter

10. The force of gravitation between two bodies does not depend on
(a) their separation
(b) the product of their masses
(c) sum of their masses
(d) gravitational constant

Chapter 10 Gravitation Quiz 3| Class 9th

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