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In some region, the gravitational field is zero. The gravitational potential in this region _____.

Must be variable

Must be constant

Cannot be zero

Must be zero

and denotes the escape velocity from the earth and another planet having twice the radius and the same mean density as the earth. Then _____.

A missile is launched with a velocity less than the escape velocity. The sum of its kinetic and potential energy is _____.

Positive

Negative

Zero

May be positive or negative depending upon its initial velocity

The escape velocity for the earth is 11.2 km/sec. The mass of another planet is 100 times that of the earth and its radius is 4 times that of the earth. The escape velocity for this planet will be _____.

112.0 km/s

5.6 km/s

280.0 km/s

56.0 km/s

The escape velocity of a body on the surface of the earth is 11.2 km/s. If the earth's mass increases to twice its present value and the radius of the earth become half, the escape velocity would become _____.

5.6 km/s

11.2 km/s (remain unchanged)

22.4 km/s

44.8 km/s

Escape velocity on earth is 11.2 km/s. What would be the escape velocity on a planet whose mass is 1000 times and radius is 10 times that of earth?

112 km/s

11.2 km/s

1.12 km/s

3.7 km/s

Escape velocity on the earth _____.

Is less than that on the moon

Depends upon the mass of the body

Depends upon the direction of projection

Depends upon the height from which it is projected

Imagine that the diameter of the earth becomes twice its present value but its mass remains unchanged. Then the weight of an object on its surface will become _____________ the present value

one-half

one-fourth

three-fourth

remain unchanged

Given: mass of the earth is 80 times the mass of moon, and the radius of the moon is 1/4th the radius of the earth. The value of acceleration due to gravity on the surface of moon will be ___ where ge denotes the acceleration due to gravity on the surface of earth.

0.16 ge

0.20 ge

0.24 ge

0.32 ge

Weightlessness experienced while orbiting the earth in spaceships is the result of

inertia

acceleration

zero gravity

pull by other planets

Must be variable

Must be constant

Cannot be zero

Must be zero

and denotes the escape velocity from the earth and another planet having twice the radius and the same mean density as the earth. Then _____.

A missile is launched with a velocity less than the escape velocity. The sum of its kinetic and potential energy is _____.

Positive

Negative

Zero

May be positive or negative depending upon its initial velocity

The escape velocity for the earth is 11.2 km/sec. The mass of another planet is 100 times that of the earth and its radius is 4 times that of the earth. The escape velocity for this planet will be _____.

112.0 km/s

5.6 km/s

280.0 km/s

56.0 km/s

The escape velocity of a body on the surface of the earth is 11.2 km/s. If the earth's mass increases to twice its present value and the radius of the earth become half, the escape velocity would become _____.

5.6 km/s

11.2 km/s (remain unchanged)

22.4 km/s

44.8 km/s

Escape velocity on earth is 11.2 km/s. What would be the escape velocity on a planet whose mass is 1000 times and radius is 10 times that of earth?

112 km/s

11.2 km/s

1.12 km/s

3.7 km/s

Escape velocity on the earth _____.

Is less than that on the moon

Depends upon the mass of the body

Depends upon the direction of projection

Depends upon the height from which it is projected

Imagine that the diameter of the earth becomes twice its present value but its mass remains unchanged. Then the weight of an object on its surface will become _____________ the present value

one-half

one-fourth

three-fourth

remain unchanged

Given: mass of the earth is 80 times the mass of moon, and the radius of the moon is 1/4th the radius of the earth. The value of acceleration due to gravity on the surface of moon will be ___ where ge denotes the acceleration due to gravity on the surface of earth.

0.16 ge

0.20 ge

0.24 ge

0.32 ge

Weightlessness experienced while orbiting the earth in spaceships is the result of

inertia

acceleration

zero gravity

pull by other planets

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