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
[WpProQuiz 62]