(i) Two masses of 100 kg each are separated by 1m apart. The gravitational force between them is,
(a) 6.67×10-11 N (b) 6.67×10-9 N (c) 6.67×10-7 N (d) 6.67×10-5 N
(ii) The value of ‘g’ on the surface of mars is,
(a) 9.8 ms-2 (b) 274.2 ms-2 (c) 25.94 ms-2 (d) 3.73 ms-2
(iii) With what force an object weighing 10N attracts the earth?
(a) 1N (b) 10N (c) 100N (d) 1000N
(iv) When the object is taken at a distance 2R from the centre of earth, the value of ‘g’ becomes,
(a) 1/4 (b) 1/9 (c) 1/16 (d) 1/2
(v) The value of ‘g’ at the height of 3000km above the surface of earth is,
(a) 7.3ms-2 (b) 6.5ms-2 (c) 4.5ms-2 (d) 4.0ms-2
(vi) Calculate the mass of moon. If the value of ‘g’ on the surface of moon is 1.62ms-2 and radius of
moon is 1740km.
(a) 7.35×1023kg (b) 6.42×1023kg (c) 7.35×1022kg (d) 6.42×1023kg
(vii) Find the weight of 10kg body on the surface of moon.
(a) 16N (b) 160N (c) 100N (d) 10N
(viii) The value of ‘g’ at the height of 100km from the surface of earth is,
(a) 9.8ms-2 (b) 7.3ms-2 (c) 4.5ms-2 (d) None
(ix) Two masses of 1000 kg each are separated by 1m apart. The gravitational force between them is,
(a) 6.67×10-11 N (b) 6.67×10-9 N (c) 6.67×10-7 N (d) 6.67×10-5 N
(x) The value of ‘g’ on the surface of Jupiter is,
(a) 9.8 ms-2 (b) 274.2 ms-2 (c) 25.94 ms-2 (d) 3.73 ms-2
(xii) When the object is taken at a distance 3R from the centre of earth, the value of ‘g’ becomes,
(a) 1/4 (b) 1/9 (c) 1/16 (d) 1/2
(xiii) The value of ‘g’ at the height of 3600 km above the surface of earth is,
(a) 7.3ms-2 (b) 6.5ms-2 (c) 4.5ms-2 (d) 4.0ms-2
(xiv) Calculate the mass of mars. If the value of ‘g’ on the surface of mars is 3.77ms-2 and radius of
mars is 3370km.
(a) 7.35×1023kg (b) 6.42×1022kg (c) 7.35×1022kg (d) 6.42×1023kg
(xv) The height of geostationary satellite from the centre of earth is,
(a) 42600 km (b) 42300 km (c) 36000 km (d) 6400 km
(xvi) GPS revolves around the earth twice a day with,
(a) 3.1 kms–1 (b) 7.9 kms–1 (c) 3.87 kms–1 (d) 3.78 kms–1
(xvii) At the height equal to one earth’s radius, the orbital speed becomes,
(a) v_o/(2 ) (b) v_o/(√2 ) (c) √2 v_o (d) 2v_o
(xviii) When the object is thrown upward with velocity greater than escape velocity, the object,
(a) will come back to earth (b) becomes a satellite
(c) escapes out earth’s gravitational field (d) none
(xix) The value of ‘g’ becomes zero at,
(a) infinity (b) centre of earth (c) both a and b (d) none
(xx) The height of geostationary satellite from the surface of earth is,
(a) 48700km (b) 42300km (c) 36000km (d) 6400km
(xxi) Moon completes one revolution around the earth in 27.3 days. The distance of moon from earth,
(a) 3.8×106m (b) 3.8×108m (c) 3.8×109m (d) 3.8×107m
(xxii) When the object is thrown upward with velocity greater than 8kms–1 from the surface of earth,
(a) if will come back to earth (b) becomes a satellite in higher orbit
(c) escapes out earth’s gravitational field (d) both ‘b’ and ‘c’
(xxiii) The gravitational field strength outside the atmosphere,
(a) is zero (b) increases (c) decreases (d) remain constant
(xxiv) The orbital speed of a low orbit satellite is,
(a) zero (b) 8 ms–1 (c) 800 ms–1 (d) 8000 ms–1
Answers
Answer:
I know
Explanation:
Two masses of 100 kg each are separated by 1m apart. The gravitational force between them is,
(a) 6.67×10-11 N (b) 6.67×10-9 N (c) 6.67×10-7 N (d) 6.67×10-5 N
(ii) The value of ‘g’ on the surface of mars is,
(a) 9.8 ms-2 (b) 274.2 ms-2 (c) 25.94 ms-2 (d) 3.73 ms-2
(iii) With what force an object weighing 10N attracts the earth?
(a) 1N (b) 10N (c) 100N (d) 1000N
(iv) When the object is taken at a distance 2R from the centre of earth, the value of ‘g’ becomes,
(a) 1/4 (b) 1/9 (c) 1/16 (d) 1/2
(v) The value of ‘g’ at the height of 3000km above the surface of earth is,
(a) 7.3ms-2 (b) 6.5ms-2 (c) 4.5ms-2 (d) 4.0ms-2
(vi) Calculate the mass of moon. If the value of ‘g’ on the surface of moon is 1.62ms-2 and radius of
moon is 1740km.
(a) 7.35×1023kg (b) 6.42×1023kg (c) 7.35×1022kg (d) 6.42×1023kg
(vii) Find the weight of 10kg body on the surface of moon.
(a) 16N (b) 160N (c) 100N (d) 10N
(viii) The value of ‘g’ at the height of 100km from the surface of earth is,
(a) 9.8ms-2 (b) 7.3ms-2 (c) 4.5ms-2 (d) None
(ix) Two masses of 1000 kg each are separated by 1m apart. The gravitational force between them is,
(a) 6.67×10-11 N (b) 6.67×10-9 N (c) 6.67×10-7 N (d) 6.67×10-5 N
(x) The value of ‘g’ on the surface of Jupiter is,
(a) 9.8 ms-2 (b) 274.2 ms-2 (c) 25.94 ms-2 (d) 3.73 ms-2
(xii) When the object is taken at a distance 3R from the centre of earth, the value of ‘g’ becomes,
(a) 1/4 (b) 1/9 (c) 1/16 (d) 1/2
(xiii) The value of ‘g’ at the height of 3600 km above the surface of earth is,
(a) 7.3ms-2 (b) 6.5ms-2 (c) 4.5ms-2 (d) 4.0ms-2
(xiv) Calculate the mass of mars. If the value of ‘g’ on the surface of mars is 3.77ms-2 and radius of
mars is 3370km.
(a) 7.35×1023kg (b) 6.42×1022kg (c) 7.35×1022kg (d) 6.42×1023kg
(xv) The height of geostationary satellite from the centre of earth is,
(a) 42600 km (b) 42300 km (c) 36000 km (d) 6400 km
(xvi) GPS revolves around the earth twice a day with,
(a) 3.1 kms–1 (b) 7.9 kms–1 (c) 3.87 kms–1 (d) 3.78 kms–1
(xvii) At the height equal to one earth’s radius, the orbital speed becomes,
(a) v_o/(2 ) (b) v_o/(√2 ) (c) √2 v_o (d) 2v_o
(xviii) When the object is thrown upward with velocity greater than escape velocity, the object,
(a) will come back to earth (b) becomes a satellite
(c) escapes out earth’s gravitational field (d) none
(xix) The value of ‘g’ becomes zero at,
(a) infinity (b) centre of earth (c) both a and b (d) none
(xx) The height of geostationary satellite from the surface of earth is,
(a) 48700km (b) 42300km (c) 36000km (d) 6400km
(xxi) Moon completes one revolution around the earth in 27.3 days. The distance of moon from earth,
(a) 3.8×106m (b) 3.8×108m (c) 3.8×109m (d) 3.8×107m
(xxii) When the object is thrown upward with velocity greater than 8kms–1 from the surface of earth,
(a) if will come back to earth (b) becomes a satellite in higher orbit
(c) escapes out earth’s gravitational field (d) both ‘b’ and ‘c’
(xxiii) The gravitational field strength outside the atmosphere,
(a) is zero (b) increases (c) decreases (d) remain constant
(xxiv) The orbital speed of a low orbit satellite is,
(a) zero (b) 8 ms–1 (c) 800 ms–1 (d) 8000 ms–1