Podcast
Questions and Answers
What condition leads to zero work being done by a force?
What condition leads to zero work being done by a force?
Which of the following statements about work done is correct?
Which of the following statements about work done is correct?
How is work done by a constant force defined mathematically?
How is work done by a constant force defined mathematically?
What is the dimensional formula for work?
What is the dimensional formula for work?
Signup and view all the answers
Under what condition is work done said to be maximized?
Under what condition is work done said to be maximized?
Signup and view all the answers
In which situation is the work done by a force at its maximum?
In which situation is the work done by a force at its maximum?
Signup and view all the answers
How is the work done by a force characterized if the angle between the force and displacement is obtuse?
How is the work done by a force characterized if the angle between the force and displacement is obtuse?
Signup and view all the answers
What is the unit of work in the SI system?
What is the unit of work in the SI system?
Signup and view all the answers
If a constant force of 10 N displaces an object by 5 m at an angle of 60 degrees, what is the work done by the force?
If a constant force of 10 N displaces an object by 5 m at an angle of 60 degrees, what is the work done by the force?
Signup and view all the answers
What is the dimensional formula of work?
What is the dimensional formula of work?
Signup and view all the answers
Which of the following statements about the relationship between work done and displacement is true?
Which of the following statements about the relationship between work done and displacement is true?
Signup and view all the answers
What will be the work done by a force if the displacement of the object is zero?
What will be the work done by a force if the displacement of the object is zero?
Signup and view all the answers
Study Notes
Work
- Work is defined as the product of force applied to an object and the displacement of that object in the direction of the force.
- Formula for work done by force: ( W = F \cdot s = F s \cos \theta ), where ( \theta ) is the angle between the force and the displacement.
- Work is considered a scalar quantity.
- SI unit of work is joule (J), while the CGS unit is erg.
- Conversion between units: 1 joule = ( 10^7 ) ergs.
- Dimensional formula for work is ([ML^2T^{-2}]).
Conditions Affecting Work Done
- Work done is zero under the following conditions:
- When there is no displacement, i.e., ( s = 0 ).
- When displacement is perpendicular to the direction of the force, i.e., ( \theta = 90^\circ ).
Sign of Work Done
- Work is positive if the angle ( \theta ) between force and displacement is acute (less than 90 degrees).
- Work is negative if the angle ( \theta ) is obtuse (greater than 90 degrees).
Dependence on Positions
- Work done by a constant force is determined solely by the initial and final positions, not by the path taken between them.
Work
- Work is defined as the product of force applied to an object and the displacement of that object in the direction of the force.
- Formula for work done by force: ( W = F \cdot s = F s \cos \theta ), where ( \theta ) is the angle between the force and the displacement.
- Work is considered a scalar quantity.
- SI unit of work is joule (J), while the CGS unit is erg.
- Conversion between units: 1 joule = ( 10^7 ) ergs.
- Dimensional formula for work is ([ML^2T^{-2}]).
Conditions Affecting Work Done
- Work done is zero under the following conditions:
- When there is no displacement, i.e., ( s = 0 ).
- When displacement is perpendicular to the direction of the force, i.e., ( \theta = 90^\circ ).
Sign of Work Done
- Work is positive if the angle ( \theta ) between force and displacement is acute (less than 90 degrees).
- Work is negative if the angle ( \theta ) is obtuse (greater than 90 degrees).
Dependence on Positions
- Work done by a constant force is determined solely by the initial and final positions, not by the path taken between them.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz explores the concept of work in physics, specifically when a force acts on an object causing displacement in the direction of the force. You will learn about the relationship between force, displacement, and the angle involved, as well as the units of work. Test your understanding of these fundamental principles!
