MULTIPLE CHOICE QUESTIONS
1.Newton's law of gravitation is valid *
1 point
on the earth only
on the moon only
in the laboratory only
everywhere
2.An astronaut in the orbit in a spacecraft feels weightlessness *
1 point
due to the absence of gravity inside
due to the fact that spacecraft has no energy
because acceleration in the orbit is equal to acceleration of gravity outside
there is no gravity outside
3. When a body is thrown upward , the force of gravity is*
1 point
in the upward direction
in the downward direction
zero
in the horizontal direction
4. What happens to the acceleration due to gravity with the increase in altitude from the surface of the earth? *
1 point
increases
decreases
first decreases and then increases
remains the same
5. The accelertion due to gravity *
1 point
has the same value everywhere in space
has the same value everywhere on the earth
varies with the latitude on the earth
is greater on the moon due to its smaller diameter
6. The mass of body is measured to be 12 kg on the earth. If it is taken to the moon, its mass will be *
1 point
12 kg
6 kg
2 kg
72 kg
Other:
7. The weight of the body is 120 N on the earth. If it is taken to the moon, its weight will be about *
1 point
120 N
60 N
20 N
60 N
20 N
720 N
8. Gravitational force is a *
1 point
repulsive force
attractive force
neither a nor b
both a and b
9. A coin and a feather are dropped together in a vaccum. Then *
1 point
the coin will reach the ground first
the feather will reach the ground first
both will reach the ground at the same time
the feather will not fall down
10. The value of g is zero *
1 point
at the top of the atmosphere
at 20 km below the surface of the earth
at 20 km above the surface of the earth
at the centre of the earth
Other:
Answers
Answered by
0
Answer:
1》everywhere
2》
because acceleration in the orbit is equal to acceleration of gravity outside
3》》
in the downward direction
4》》》decreases
5!!》》》
varies with the latitude on the earth
6》》》
7》》
2kg
8》》》
attractive force
9》》》
both will reach the ground at the same time
10》》
at the centre of the earth
Answered by
3
Answer:
Ans 1) a) on the earth only
Ans 10) d) at the center of the earth
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