General Physics Questions And Answers, Set 20

 

General Physics Questions And Answers

Q1. 

A unit vector has the magnitude of ___

Answer :  

1

Q2. 

What is a vector quantity?

Answer : 

A quantity with both magnitude and direction

Q3. 

The operation which does not give you a vector as an output from two vector inputs is ___

Answer :  

Dot product

Q4. 

A stone tie with a string held at one end is being rotated at a constant angular velocity in the air. The tangential velocity will remain constant if ___

Answer :  

The plane of motion of the stone is parallel to the ground

Q5. 

A block of mass 5 Kg, exhibits circular motion with the mass decreasing at the rate of 0.5 Kg/s. At what time the centripetal force will be zero on the block?

Answer : 

At 10 s

Q6. 

The first condition of equilibrium of a body is __

Answer :  

Sum of all force on a body should be zero

Q7. 

Two bodies are accelerating towards each other. After sometime they collide. Which one of the following statements is true about the system?

Answer :  

The total momentum remains conserved about the instant of collision

Q8. 

A driver hits a light pole with a force a 100 N. What force does the car experience?

Answer :  

100 N

Q9. 

What causes the motion of a body which is initially in the state of rest?

Answer :  

Force

Q10. 

Inertia is __

Answer :  

Property of mass to accelerate

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