General Physics Questions And Answers, Set 26

 

General Physics Questions And Answers

Q1. 

If mass (m) is doubled and velocity (v) is halved then _____

Answer :  

Kinetic energy decreases by half

Q2. 

According to the work-energy theorem, total change in energy is equal to the _______

Answer :  

Total work done

Q3. 

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

Answer :  

Potential energy

Q4. 

Energy involved in creating work _____

Answer :  

Gets transferred

Q5. 

The angular momentum vector of a particle about a point on the rotational axis is parallel to its angular velocity vector, provided the particle rotates with fixed speed about that axis. True or False?

Answer :  

False

Q6. 

Two cylinders have the same mass and radius. One is hollow and the other is solid. Which one will have the greater moment of inertia about the central axis?

Answer :  

Hollow cylinder

Q7. 

If forces are acting on a rigid body so that it has zero kinetic energy, then all forces will pass through the centre of mass and have a vector sum of zero. True or False?

Answer :  

False

Q8. 

Consider a system on which there are external forces acting. If the vector sum of all these external forces is zero, then the centre of mass _____

Answer :  

may move

Q9. 

Centre of mass can vary upon the application of internal force.

Answer : 

False

Q10. 

How do astronauts define “up” or “down” in space?

Answer :  

There is no “up” or “down” in space

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