The escape velocity of the earth is “v”. If an object is thrown ve – McqOptions

MCQOPTIONS

1.	The escape velocity of the earth is “v”. If an object is thrown vertically upwards with a velocity “kv”, what is the speed of the object at infinity?
A.	v/(k2-1)1/2
B.	v(k2-1)1/2
C.	v2/(k2-1)
D.	v2 (k2-1)
Answer» C.

Discussion

No Comment Found

Related MCQs

A particle is kept at a distance R above the earth’s surface. What is the minimum speed with which it should be projected so that it does not return?
A planet as a radius “R” and density “P”. The escape velocity of this planet is _____
The escape velocity of a planet depends on the radius of its orbit around the parent star.
The escape velocity at the event horizon of a black hole is 3×108 m/s, i.e., the velocity of light. What is the mass of the black hole if the distance from its centre to the event horizon is 18km?
The escape velocity of the earth is “v”. If an object is thrown vertically upwards with a velocity “kv”, what is the speed of the object at infinity?
An object is projected vertically upwards with a velocity (gr) 1/2. What is the maximum height reached by the object if “R” is the radius of the earth and “g” is the acceleration due to gravity?
What is the minimum velocity required for an object of mass “m” to escape the gravitational pull of a planet of mass “M” and radius “R” from its surface?
The ratio of the radius of a planet A to that of a planet B is “r”. The ratio of acceleration due to gravity on the planets is “p”. The ratio of escape velocities of the two planets is _____