Work Done on a System by an External Force MCQ Quiz - Objective Question with Answer for Work Done on a System by an External Force - Download Free PDF
Last updated on May 6, 2025
Latest Work Done on a System by an External Force MCQ Objective Questions
Work Done on a System by an External Force Question 1:
If reaction is R and coefficient of friction is μ, what is work done against friction in moving a body by distance d?
Answer (Detailed Solution Below)
Work Done on a System by an External Force Question 1 Detailed Solution
Calculation:
The work done against friction when moving a body by a distance d is given by:
W = Ff . d
Where Ff is the force of friction and d is the distance moved. The force of friction can be calculated as:
Ff = μ . R
Where μ is the coefficient of friction and R is the normal reaction force exerted by the surface.
Substituting into the work formula:
W = μ . R . d = μRd
Top Work Done on a System by an External Force MCQ Objective Questions
Work Done on a System by an External Force Question 2:
If reaction is R and coefficient of friction is μ, what is work done against friction in moving a body by distance d?
Answer (Detailed Solution Below)
Work Done on a System by an External Force Question 2 Detailed Solution
Calculation:
The work done against friction when moving a body by a distance d is given by:
W = Ff . d
Where Ff is the force of friction and d is the distance moved. The force of friction can be calculated as:
Ff = μ . R
Where μ is the coefficient of friction and R is the normal reaction force exerted by the surface.
Substituting into the work formula:
W = μ . R . d = μRd