Gravitation(General Knowledge > General Science ) Questions and answers for exam Preparation

Question 1. The gravitational force between two spheres of masses 1000 kg kept 1m apart is

10 N
6.673 * 10-5
12 N
5 N

Explanation:-

Answer: Option B. -> 6.673 * 10-5

Question 2. If the mass of earth is 6

7 ms-1
7 ms-2
7.3 ms-1
7.3 ms-2

Explanation:-

Answer: Option D. -> 7.3 ms-2

Question 3. Value of g increases with the

decrease in altitude
increase in altitude
increase in body mass
decrease in body mass

Explanation:-

Answer: Option A. -> decrease in altitude

Question 4. 2 lead spheres having a mass of 1000 kg each are placed with their centers 1 m apart

6.673 x105
66.73 x105
6673 x10-5
6.673 x10-5

Explanation:-

Answer: Option D. -> 6.673 x10-5

Question 5. The gravitational force of attraction between satellite and earth provides

centripetal force
centrifugal force
resistive force
momentum force

Explanation:-

Answer: Option A. -> centripetal force

Question 6. The moon completes one revolution around the Earth in

30 days
24 days
26 days
27.3 days

Explanation:-

Answer: Option D. -> 27.3 days

Question 7. To move around the Earth, a satellite requires

centrifugal force
centripetal force
dynamic force
translatory force

Explanation:-

Answer: Option B. -> centripetal force

Question 8. With mass ‘m’, altitude ‘h’, radius ro and velocity vo, the centripetal force is equal to

Fc =( mvo²) ⁄ ro
Fc =( mvo) ⁄ ro
Fc =( mro²) ⁄ vo
Fc =( mvo² + ro)

Explanation:-

Answer: Option A. -> Fc =( mvo²) ⁄ ro

Question 9. The distance of moon from the Earth is

395,000 km
420,000 km
380,000 km
450,000 km

Explanation:-

Answer: Option C. -> 380,000 km

Question 10. In SI units, the value of gravitational constant(G) is

6.673 x10-11
8.673 x105
6.673 x105
4.673 x105

Explanation:-

Answer: Option A. -> 6.673 x10-11