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Question-1 The largest and the shortest distance of the earth from the sun are r₁ and r₂. Its distance from the sun when it is perpendicular to the major axis of the orbit drawn from the sun.

(A)	(B)
(C)	(D)

Question-2
The escape velocity from the surface of the earth is v_e. The escape velocity from the surface of a planet whose mass and radius are three times those of the earth, will be

(A) v_e	(B) 3v_e
(C) 9v_e	(D) ¹/3v_e

Question-3
The distances of two planets from the sun are 10^₁₃ and 10^₁₂ m respectively. The ratio of time periods of these two planets is

(A) ¹/_√10	(B) 100
(C) 10 √10	(D) √10

Question-4
Two spheres of masses m and M are situated in air and the gravitational force between them is F. The space around the masses is now filled with a liquid of specific gravity 3. The gravitational force will now be

(A)	(B)
(C) 3F	(D) F

Question-5 The satellite of mass m is orbiting around the earth in a circular orbit with a velocity v. What will be its total energy ?

(A)	(B)
(C)mv²	(D)

Question-6 Fo9r a satellite escape velocity is 11 km/s. If the satellite is launched at an angle of 60^o with the vertical, then escape velocity will be

(A) 11 km/s	(B)
(C)	(D)33 km/s

Question-7 A roller coaster is designed such that riders experience "weightlessness" as they go round the top of a hill whose radius of curvature is 20 m. The speed of the car at the top of the hill is between

(A) 14 m/s and 15 m/s	(B)15 m/s and 16 m/s
(C)16 m/s and 17 m/s	(D)13 m/s and 14 m/s

Question-8
A ball is dropped from a satellite revolving around the earth at a height of 120 km. The ball will

(A) continue to move with same speed along a straight line tangentially to the satellite at that time.	(B) continue to move with the same speed along the original orbit of satellite
(C) fall down to earth gradually	(D) go far away in space

Question-9 Two satellites of earth, S₁ and S₂ , are moving in the same orbit. The mass of is S₁ four times the mass of S₂ . Which one of the following statements is true ?

(A) The time period of S₁ is four times that of S₂	(B)The potential energies of earth and satellite in the two cases are equal.
(C)S₁ and S₂are moving with the same period	(D)The kinetic energies of the two satellites are equal

Question-10 A body attains a height equal to the radius of the earth. The velocity of the body with which it was projected is

(A)	(B)
(C)	(D)

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Plus 1 Biology Science

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