Gravitational field - Jamb Physics Past Questions and Answers

Question 6:

• JAMB 1995

A body is projected from the earth's surface with the intention of letting it escape from the earth's gravitational field. What is the minimum escape velocity of the body? [Earth's radius = 6.4 x 10³km, g = 10ms^-2]

A. 14 kms^-1
B. 13 kms^-1
C. 12 kms^-1
D. 11 kms^-1

Question 7:

• JAMB 1997

A planet has mass m₁ and is at a distance r, from the sun. A second planet has mass m₂ = 10m₁ and at a distance of r₂ = 2r₁ from the sun. Determine the ratio of the gravitational force experienced by the planets.

A. 1 : 5
B. 2 : 5
C. 3 : 5
D. 4 : 5

Question 8:

• JAMB 1999

The diagram above shows a solid figure with base PQ and center of gravity G on a inclined plane. Which of the following statements is correct

A. The solid will fall over if the vertical line through G lies outside the base
B. The solid will fall over if the vertical line through lies inside the base
C. The solid will not fall over if the vertical line through G lies outside the base
D. The solid can never fall over

Question 9:

• JAMB 2001

I. The earth is not spherical but elliptical in shape
II. Variation in latitude and longitude
III. Rotation of the earth on its axis
IV. Variation in the density of the earth
On which combination of the above does the weight of an object vary on the earth's surface?

A. I, II, III and IV
B. II, III and IV only
C. I, II and III only
D. I and II only

Question 10:

• JAMB 2002

If the distance between two suspended masses 10kg each is tripled, the gravitational force of attraction between them is reduced by

A. One half
B. One third
C. One quarter
D. One ninth