General Physics Questions And Answers, Set 30

 

General Physics Questions And Answers

Q1. 

Work done by a force on a body is an example of ______

Answer : 

Mechanical work

Q2. 

The energy possessed by a body by the virtue of its motion is called ______

Answer :  

Kinetic energy

Q3. 

In which category do potential and kinetic energy fall?

Answer :  

Mechanical energy

Q4. 

A particle is rotating about a fixed axis. The angular momentum of the particle about any point on the fixed axis is the same. True or False?

Answer :  

False

Q5. 

Moment of inertia, of a spinning body about an axis, doesn’t depend on which of the following factors?

Answer :  

Angular velocity

Q6. 

There are two external forces acting on a system of particles. Select the correct statement.

Answer :  

Linear momentum may be conserved

Q7. 

An asteroid enters the atmosphere of the earth and breaks into two pieces. One of the pieces is larger than the other. Which of the following is true considering the centre of mass of both the pieces together?

Answer :  

The centre of mass remains in the same trajectory as before breaking apart of the asteroid

Q8. 

Three identical spheres each of radius R are placed such that their centres lie on a straight line. What is the location of their centre of mass from the centre of the first sphere?

Answer :  

2R

Q9. 

A person sitting in a chair in a satellite feels weightless because _____

Answer : 

The normal force is zero

Q10. 

The height of the geostationary satellites above the earth’s surface is approximately 36,000 km.

Answer :  

True

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