General Physics Questions And Answers, Set 19

 

General Physics Questions And Answers

Q1. 

Eleven times unit vector along X added to 7 times unit vector along Y gives ______

Answer : 

11î + 7ĵ

Q2. 

What is a scalar?

Answer :  

A quantity with only magnitude

Q3. 

The operation used to obtain a scalar from two vectors is ______

Answer :  

Dot product

Q4. 

Which of the following is a suitable word to describe the motion of a rotating ball tied to rope tied tightly to a fixed support?

Answer :  

Spiral motion

Q5. 

The second condition of equilibrium of a body is ___

Answer :  

Sum of all moments on a body should be zero

Q6. 

A set of forces are acting on a body in equilibrium. Which one of the following is true?

Answer :  

The vector sum of the forces is zero

Q7. 

What is the plural of the word ‘momentum’?

Answer : 

Momenta

Q8.

A batsman hits a ball with a force a 5 N. What force does the bat experience?

Answer :  

5 N

Q9. 

How do we calculate force in a variable mass constant velocity system?

Answer :  

F = v(dm/dt)

Q10. 

Why do we not experience any leaning when a train takes a turn?

Answer :  

Because of large turning radius

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