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Physics
Class 9
Lakhmir Singh
1
Chapter 1: Motion
117 questions
2
Chapter 2: Force and Laws of Motion
114 questions
3
Chapter 3: Gravitation
157 questions
Q1
Question 61:
The weight of an object at the centre of the earth of radius R is :
(a) zero
(b) R times the weight at the surface of the earth
(c) infinite
(d) 1/R2 times the weight at the surface of the earth
(a) zero
(b) R times the weight at the surface of the earth
(c) infinite
(d) 1/R2 times the weight at the surface of the earth
Q2
Question 62:
Two objects of different masses falling freely near the surface of moon would :
(a) have same velocities at any instant
(b) have different accelerations
(c) experience forces of same magnitude
(d) undergo a change in their inertia
(a) have same velocities at any instant
(b) have different accelerations
(c) experience forces of same magnitude
(d) undergo a change in their inertia
Q3
Question 63:
The value of acceleration due to gravity of earth :
(a) is the same on equator and poles
(b) is the least on poles
(c) is the least on equator
(d) increases from pole to equator
View all question(a) is the same on equator and poles
(b) is the least on poles
(c) is the least on equator
(d) increases from pole to equator
4
Chapter 4: Work and Energy
128 questions
5
Chapter 5: Sound
162 questions
Question
Question 62:
Two objects of different masses falling freely near the surface of moon would :
(a) have same velocities at any instant
(b) have different accelerations
(c) experience forces of same magnitude
(d) undergo a change in their inertia
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Text solution
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Answer:
(a) have same velocity at any instance
We know,
v = u + at
⇒ v = 0 + gt
[Here, g is acc. Due to gravity on moon]
Thus, the equation of velocity for a freely falling body is independent of the mass of the body.
So, different masses that are dropped simultaneously with the same or zero initial velocity will have same velocity at any instant.
We know,
v = u + at
⇒ v = 0 + gt
[Here, g is acc. Due to gravity on moon]
Thus, the equation of velocity for a freely falling body is independent of the mass of the body.
So, different masses that are dropped simultaneously with the same or zero initial velocity will have same velocity at any instant.
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Practice more questions from Physics (Lakhmir Singh)
Q1
Question 61:
The weight of an object at the centre of the earth of radius R is :
(a) zero
(b) R times the weight at the surface of the earth
(c) infinite
(d) 1/R2 times the weight at the surface of the earth
(a) zero
(b) R times the weight at the surface of the earth
(c) infinite
(d) 1/R2 times the weight at the surface of the earth
Q2
Question 62:
Two objects of different masses falling freely near the surface of moon would :
(a) have same velocities at any instant
(b) have different accelerations
(c) experience forces of same magnitude
(d) undergo a change in their inertia
(a) have same velocities at any instant
(b) have different accelerations
(c) experience forces of same magnitude
(d) undergo a change in their inertia
Q3
Question 63:
The value of acceleration due to gravity of earth :
(a) is the same on equator and poles
(b) is the least on poles
(c) is the least on equator
(d) increases from pole to equator
View all(a) is the same on equator and poles
(b) is the least on poles
(c) is the least on equator
(d) increases from pole to equator
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| Question Text | Question 62:
Two objects of different masses falling freely near the surface of moon would : (a) have same velocities at any instant (b) have different accelerations (c) experience forces of same magnitude (d) undergo a change in their inertia |
| Updated On | Feb 15, 2022 |
| Topic | Gravitation |
| Subject | Science |
| Class | Class 9 |
| Answer Type | Text solution:1 Video solution: 1 |
| Upvotes | 170 |
| Avg. Video Duration | 4 min |
