Advertisements
Advertisements
Question
State two conditions when no work is done by a force.
Answer in Brief
Advertisements
Solution
Two conditions are:
- No work is said to be done if there is no change in position or no motion even after the application of force. There should be no displacement i.e. S = 0
- When the angle between the displacement and force applied is 90 degrees i.e the force applied is perpendicular to the displacement. The displacement is NORMAL to the direction of FORCE i.e. –θ = 90°
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
An object thrown at a certain angle to the ground moves in a curved path and falls back to the ground. The initial and the final points of the path of the object lie on the same horizontal line. What is the work done by the force of gravity on the object?
Ravi applied a force of 10 N and moved a book 30 cm in the direction of the force. How much was the work done by Ravi?
What is meant by a translational motion? Give one example.
Can a body possess zero kinetic energy?
A body is thrown vertically upwards. Its velocity keeps on changing. What happens to its K.E. when does its velocity become zero?
What is the amount of energy spent in lifting 1 kg through 1 m? Take g = 10 ms-2.
Can we destroy every energy associated with a body?
Give an example
Light energy changes to electrical energy.
What are the advantages and disadvantages of using solar cells for producing electricity?
Work done by this force at any instant is ______.
