Practice Work Done By A Variable Force (5.5) - WORK, ENERGY AND POWER - CBSE 11 Physics

Practise this section

5 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
3 questions · about 2 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
Define a variable force and provide an example.
Show hintHide hint
Think of forces that act differently based on their position.
Question 2.
Explain how you would calculate the work done by a variable force.
Show hintHide hint
This involves summation and limits, resulting in an integral.
3Question 3.
What is work done by a variable force?
- Integral of force over displacement
- Force multiplied by displacement
- The total area under curve
Show hintHide hint
Think about how we sum up work for small segments.
4Question 4.
True or False: The work done by a variable force is always positive.
- True
- False
Show hintHide hint
Consider the direction of force compared to displacement.
Question 5.
Calculate the work done by a force described by F(x) = 3x² from x = 0 to x = 2.
Show hintHide hint
Set up and calculate the definite integral correctly.
Question 6.
A spring with a force equation F(x)=kx stretches from 0 to 2 m. If k = 100 N/m, calculate the work done.
Show hintHide hint
Don’t forget the half factor in the spring work formula.

1 more question in this section. Enroll free to practise them all.