General Physics Questions And Answers, Set 24

 

General Physics Questions And Answers

Q1. 

The second law of motion, in mathematical form can be written as ____

Answer :  

F = dp/dt

Q2. 

For what value of e is a collision perfectly elastic?

Answer :  

1

Q3. 

When e < 1, the kinetic energy in the collision is ____

Answer :  

Lost

Q4. 

The law of conservation of energy is not applicable to mechanical systems as they require energy input to keep working.

Answer :  

False

Q5. 

When a person intakes 3000 kcal of food, he is able to do work requiring energy of 2500 kcal. This means that the human body destroys a fraction of energy obtained from food.

Answer :  

False

Q6. 

The potential energy of an object maximises as its velocity increases.

Answer :  

False

Q7. 

Find the ratio of potential energy if an object is raised to thrice of its height and its mass is tripled.

Answer :  

1:9

Q8. 

The maximum value of static friction when the body is at the verge of starting motion is known as _____

Answer :  

Limiting friction

Q9. 

Which of the following is not a conservative force?

Answer :  

Friction force

Q10. 

An external force is acting on a system, the work done on the system is change in its kinetic energy.

Answer : 

True

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