Gravitational Force - Study Mode

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[#96] The force of gravity exists between . . . . . . . . objects, but cannot be felt until the mass of objects, such as planets, is very high-

(A) four

(B) each and every

(C) only two

(D) only one

Correct Answer

(B) each and every

[#97] Consider the following statements. 1. The time period of satellite does not depend on the radius of the orbit. 2. The orbital velocity is inversely proportional to the square root of the radius of the orbit. 3. The orbital velocity of a satellite increases with the radius of the orbit. Which of the statement(s) given above is/are correct?

(A) Only 1

(B) Only 2

(C) 1 and 2

(D) 1, 2 and 3

Correct Answer

(B) Only 2

[#98] The force of gravity between of two objects is F. If the mass of objects is halved without changing their distance, the gravitational force will be:

(A) 2F

(B) F

(C) $$frac{F}{2}$$

(D) $$frac{F}{4}$$

Correct Answer

(D) $$frac{F}{4}$$

[#99] The weight of a body at the center of the Earth will be:

(A) zero

(B) infinite

(C) as much as on the surface of the earth

(D) None of the above

Correct Answer

(A) zero

[#100] The radius and mass of a planet are half of the Earth's radius and mass. What will be the value of g on this planet?

(A) 4.9 m/s 2

(B) 9.8 m/s 2

(C) 19.6 m/s 2

(D) 39.2 m/s 2

Correct Answer

(C) 19.6 m/s 2