Distinction between mass and weight; escape velocity - Jamb Physics Past Questions and Answers

Question 1:

• JAMB 2019

If the time of flight is 96seconds, calculate the horizontal range through the point of projection.

A. 84400m
B. 69000m
C. 61440m
D. 24000m

Question 2:

• 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 3:

• JAMB 2014

Calculate the escape velocity of a satellite launched from the earth's surface if the radius of the earth is 6.4x10⁶m

A. 25.3kms^-1
B. 4.2kms^-1
C. 4.0kms^-1
D. 11.3kms^-1