Gravitational field - Jamb Physics Past Questions and Answers

Question 11:

• JAMB 2003

A satellite is in a parking orbit if its period is

A. Less than the period of the earth
B. More than the period of the earth
C. Equal to the period of the earth
D. The square of the period of the earth

Question 12:

• JAMB 2004

The earth is four times the size of the moon and the acceleration due to gravity on the earth is 80 times that on the moon. The ratio of the mass of the moon to that of the earth is

A. 1:80
B. 1:320
C. 1:1280
D. 1:4

Question 13:

• JAMB 2006

If the radius of the earth is 6.4 x 10⁶m, the escape velocity of a satellite from the earth is?
[g = 10 ms^-2]

A. 1.13 x 10⁴ ms^-1
B. 9.00 x 10³ ms^-1
C. 8.00 x 10³ ms^-1
D. 1.27 x 10⁴ ms^-1

Question 14:

• JAMB 2007

Two spheres of masses 5.0 kg and 10.0 kg are 0.3 m apart. Calculate the force of attraction between them?
[G = 6.67 X 10^-11 Nm² Kg²]

A. 3.50 x 10^-10N
B. 3.71 x 10^-8 N
C. 3.57 x 10^-2N
D. 4.00 x 10²N

Question 15:

• JAMB 2010

A stone and a feather are dropped from the same height above the earth surface. ignoring air resistance, which of the following is correct?

A. The feather will be brown away by the wind while stone will drop steadily
B. The stone and the feather will both reach the ground a the same time
C. The feather will reach the ground first
D. The stone will reach the ground first