PHYSICS paper II , B.Sc II sem pure
Gravitation- Multiple Choice Questions
Identify the choice that best completes the statement or answers the question.( Any 10)
1. Newton reasoned that the gravitational
attraction between Earth and the moon must be
_____.
a. reduced by distance
b. independent of distance
c. directly proportional to distance
d. the same at all distances
2. If the mass of Earth increased, with no change in radius, your weight would _____.
a. stay the same
b. decrease
c. increase also
d none of above
3. If the radius of Earth decreased, with no change in mass, your weight would _____.
a. not change
b. increase
c. decrease
4. If Earth's mass decreased to one half its original mass, with no change in radius, then your weight would _____.
a. stay the same
b. decrease to one half your original weight
c. decrease to one quarter your original weight
d. none of the above
5. The gravitational force between two massive
spheres
a. is always an attraction.
b. depends on how massive they are.
c. depends inversely on the square of the
distances between them.
d. all of the above
6. A very massive object A and a less massive object
B move toward each other under the influence of
mutual gravitation. Which force, if either, is
greater?
a. The force on B
b. The force on A
c. Both forces are the same.
7. Two objects move toward each other because of gravitational attraction. As the objects get closer and closer, the force between them _____.
a. remains constant
b. decreases
c. increases
8. Suppose the gravitational force between two
massive spheres is 100 N. If the distance between the spheres is doubled, what is the force between the masses?
a. 400 N
b. 200 N
c. 100 N
d. 50 N
e. 25 N
9. The force of gravity on you is greatest when you are standing _____.
a. far above Earth's surface
b. just above Earth's surface
c. on Earth's surface
10. A planet has half the mass of the Earth and half
the radius. Compared to its weight on Earth, an
apple on this planet would weigh _____.
a. twice as much
b. one-fourth as much
c. half as much
d. the same
e. zero
11. If you stood atop a ladder on Earth that was as
tall as Earth's radius (so you were twice as far
from Earth's center) your weight atop the ladder
would be _____.
a. one-eighth its normal value
b. one-quarter its normal value
c. half its normal value
d. none of the above
12. A 560-N woman stands on top of a very tall
ladder so she is one Earth radius above Earth's
surface. How much does she weigh?
a. zero
b. 140 N
c. 280 N
d. 560 N
e. none of the above
13. Suppose the gravitational force between two
spheres is 30 N. If the magnitude of each mass
doubles, what is the force between the masses?
a. 8 N
b. 15 N
c. 30 N
d. 60 N
e. 120 N
14. What event will produce the greatest inrease in
the gravitational force between the two masses?
a. Doubling the large mass
b. Doubling the distance between the masses
c. Reducing the small mass by half
d. Reducing the distance between the masses by
half
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