(a) Laws of motion (b) Laws of rotational motion (c) Laws of planetory motion (d) Laws of curvilinear motion Answer: c (6)
(a) 1/2 year (b) 2√2 years (c) 4 years (d) 8 years Answer: b (4)
(a) 1 : 2 (b) 1 : 1 (c) 1 : 3 (d) None of these Answer: b (5)
A satellite A of mass m is at a distance of r from the centre of the earth. Another satellite B of mass 2m is at a distance of 2r from the earth’s centre. Their time periods are in the …
(a) Conservation of energy (b) Conservation of linear momentum (c) Conservation of angular momentum (d) None of these Answer: c (6)
(a) 8 times (b) 4 times (c) 1/8 times (d) 1/4 times Answer: c (22)
According to Kepler, the period of revolution of a planet (T) and its mean distance from the sun (r) are related by the equation (a) T3 r3 = constant (b) T2 r–3 = constant (c) Tr3 = constant …
(a) The orbital velocity depends on the mass of the satellite (b) A minimum velocity of 8 km/sec is required by a satellite to orbit quite close to the earth (c) The period of revolution is large if the radius …
(a) Greater than the orbital speed of earth (b) Less than the orbital speed of earth (c) Equal to the orbital speed of earth (d) Zero Answer: b (15)
(a) Energy (b) Angular momen (c) Linear momentum (d) None of these Answer: b (4)
(a) 1.25 years (b) 1.59 years (c) 0.89 years (d) 2 years Answer: d (8)
(a) 83 minutes (b) 83 × √8 minutes (c) 664 minutes (d) 249 minutes Answer:c (6)
(a) -(1/2)Mv2 (b) (1/2)Mv2 (c) (3/2)Mv2 (d) Mv2 Answer: a (5)
(a) 20 hours (b) 10 hours (c) 80 hours (d) 40 hours Answer: d (3)
(a) T/R (b) T/R2 (c) T2/ R2 …
(a) Increase (b) Decrease (c) Unchanged (d) Nothing can be said Answer: b (6)
(a) 6400 km (b) 4800 km (c) 32000 km (d) 36000 km Answer: d (4)
(a) Zero (b) Equal to that on the earth (c) More than that on the earth (d) Less than that on the earth Answer: a (48)
(a) It will continue to move with velocity v along the original orbit of spacecraft (b) It will move with the same speed tangentially to the spacecraft (c) It will fall down to the earth gradually (d) It will go …
(a) The earth does not attract the objects in a satellite (b) The normal force by the chair on the person balances the earth’s attraction (c) The normal force is zero (d) The person in satellite is not accelerated Answer: …
(a) -(GMm/r) (b) GMm/r (c) GMm/2r (d) – ( GMm/2r) Answer: d …
(a) 1/2 lunar month (b) 2/3 lunar month (c) 2-3/2 lunar month (d) 23/2lunar month Answer: c (8)
(a) 3 v/2 (b) 4 v/2 (c) 6 v (d) 12 v Answer: c (10)
(a) Half the present year (b) One-eighth the present year (c) One-fourth the present year (d) One-sixth the present year Answer: b (8)
(a) It is heavier than other planets (b) It has higher density than other planets (c) It is closer to the earth than other planets (d) It has no atmosphere Answer: c (6)
(a) 100% (b) 41.4% (c) 50% (d) 59.6% Answer: b (4)
(a) A circle (b) An ellipse (c) A parabola (d) A straight line Answer: b (9)
(a) 4T (b) T/4 (c) 8T (d) T/8 Answer: c (5)
(a) T ∞ R (b) T ∞ R2 (c) T ∞ R3 (d) T ∞ R4 Answer: c (7)
(a) Black (b) White (c) Green (d) Blue Answer: A (10)
(a) 1 : 3 (b) 3 : 1 (c) 3 : 4 (d) 12 : 1 Answer: d (6)
(a) Velocity (b) Angular momentum (c) Potential energy (d) Acceleration (e) Kinetic energy Answer: b (8)
(a) Over any city on the equator (b) Over the north or south pole (c) At height R above earth (d) At the surface of earth Answer: a (14)
(a) √2 gR (b) √gR (c) √2 g/R (d) √g/R Answer: b (7)
(a) 4 days (b) 8 days (c) 16 days (d) 32 days Answer: b (7)
(a) It moves in a plane containing the Greenwich meridian (b) It moves in a plane perpendicular to the celestial equatorial plane (c) Its height above the earth’s surface is about the same as the radius of the earth (d) …