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
Quiz-summary
0 of 10 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
Information
Click on ‘Start Quiz’ to Take Test.
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 10 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
Categories
- Not categorized 0%
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- Answered
- Review
-
Question 1 of 10
1. Question
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
Correct
The mass of the body is always constant.
Incorrect
The mass of the body is always constant.
-
Question 2 of 10
2. Question
The weight of a 1 kilogram mass body on the earth will be
Correct
Weight of a body = mg = 1×9.8 = 9.8 N
Incorrect
Weight of a body = mg = 1×9.8 = 9.8 N
-
Question 3 of 10
3. Question
What is the direction of centripetal force on an object moving with constant speed in a circular track?
Correct
The centripetal force is in tangential direction. This can be observed when we leave a stone tied with string and revolve it in circle with a constant radius. When we leave the string the stone will move in the direction at which it was left.
Incorrect
The centripetal force is in tangential direction. This can be observed when we leave a stone tied with string and revolve it in circle with a constant radius. When we leave the string the stone will move in the direction at which it was left.
-
Question 4 of 10
4. Question
The ratio of the weight of a body on the moon to the weight of the same body on the earth is
Correct
Gravity on moon’s surface is 1/6th of the Earth’s surface
Incorrect
Gravity on moon’s surface is 1/6th of the Earth’s surface
-
Question 5 of 10
5. Question
Two particles are kept at a separation r. The gravitational force between them is proportional to
Correct
Incorrect
-
Question 6 of 10
6. Question
The equation F = Gm1m2/r2 is valid for:
Correct
The formula is only valid for the point masses and uniform masses bodies.
Incorrect
The formula is only valid for the point masses and uniform masses bodies.
-
Question 7 of 10
7. Question
The force of gravitation between two bodies of mass 1 kg each kept at a distance of 1 m is:
Correct
F = Gm1m2/r2 (6.67 x 10-11 ×1×1)/12 = 6.67 × 10-11N
Incorrect
F = Gm1m2/r2 (6.67 x 10-11 ×1×1)/12 = 6.67 × 10-11N
-
Question 8 of 10
8. Question
A coin and a feather are dropped together in a vacuum:
Correct
Acceleration of the body doesn’t depend on the mass of the body.
Incorrect
Acceleration of the body doesn’t depend on the mass of the body.
-
Question 9 of 10
9. Question
The SI unit of thrust is
Correct
Thrust is also a kind of force.
Incorrect
Thrust is also a kind of force.
-
Question 10 of 10
10. Question
The force of gravitation between two bodies does not depend on
Correct
F=Gm1m2/r2
Incorrect
F=Gm1m2/r2