Gravitation (NEET Physics): Questions 66 - 70 of 82

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Question number: 66

» Gravitation » Gravitational Acceleration

MCQ▾

Question

What will be the acceleration due to gravity on the surface of the moon if its radius is 14th the radius of the earth and its mass is 180th the mass of the earth?

Choices

Choice (4) Response

a.

g6

b.

g5

c.

g7

d.

g8

Question number: 67

» Gravitation » Gravitational Acceleration

MCQ▾

Question

At what height above the earth’s surface does the force of gravity decrease by 10%? Assume radius of earth to be 6370 km.

Choices

Choice (4) Response

a.

245 km

b.

300 km

c.

150 km

d.

345 km

Question number: 68

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

Spot the incorrect statements: The acceleration due to gravity ‘g’ decreases if

(1) We go down from the surface of the earth towards its center

(2) We go up from the surface of the earth

(3) The rotational velocity of the earth is increased

(4) We go from the poles towards the equators on the surface of the earth

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1, 2 and 3 are correct

c.

1 and 2 are correct

d.

1 and 3 are correct

Question number: 69

» Gravitation » Gravitational Acceleration

MCQ▾

Question

If the value of ‘g’ at a height h above the surface of the earth is the same as at a depth x below it, then (both x and h being much smaller than the radius of the earth)

Choices

Choice (4) Response

a.

x=h

b.

x=2h

c.

x=h2

d.

x=h2

Question number: 70

» Gravitation » Gravitational Acceleration

MCQ▾

Question

What would be the angular speed of earth, so that bodies lying on equator may experience weightlessness? (g = 10 m/s 2 and radius of earth = 6400 km)

Choices

Choice (4) Response

a.

1.25 ⨯ 10 -2 rad/sec

b.

1.25 ⨯ 10 -1 rad/sec

c.

1.25 ⨯ 10 -4 rad/sec

d.

1.25 ⨯ 10 -3 rad/sec

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