General Physics Questions And Answers, Set 33

General Physics Questions And Answers

Q1. 

A polar orbit is ideal for a spy satellite.

Answer : 

True

Q2. 

What is the magnitude of the ratio of KE and PE of a satellite revolving around a planet in a circular orbit of radius “R”?

Answer : 

1:2

Q3. 

Assume that a satellite executes perfectly circular orbits around a perfectly circular sphere. The work done by the satellite in 1 complete revolution is _____

Answer : 

0

Q4. 

A satellite is seen after every 8 hours. If it rotates opposite to that of the earth, what is its angular velocity about the centre of the earth? Assume the earth is perfectly spherical and the satellite is in the equatorial plane.

Answer : 

pi/6

Q5. 

The time period of a satellite is independent of the mass of the satellite.

Answer : 

True

Q6. 

The escape velocity for an object to leave the surface of the earth does not depend on its size, shape, mass or direction of projection of the body.

Answer : 

True

Q7. 

The value of gravitational potential inside a uniform thin spherical shell is the same everywhere.

Answer : 

True

Q8. 

Assume that the earth is a perfect sphere but of non-uniform interior density. Then, acceleration due to gravity on the surface of the earth _____

Answer : 

cannot be zero at any point

Q9. 

For an object on the surface of the earth, the magnitude of the acceleration due to the gravity of the earth it experiences depends also depends on the mass of that object.

Answer : 

False

Q10. 

Which scientist introduced the universal law of gravitation?

Answer : 

Isaac Newton

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