Advertisements
Advertisements
Question
When do we say that work is done?
Short Answer
Advertisements
Solution
- When a force operates on an object and causes it to be displaced from its original location, it produces work.
- A force acts on the body.
- There is a displacement of the body caused by the applied force along the direction of the applied force.
shaalaa.com
Is there an error in this question or solution?
RELATED QUESTIONS
Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why?
Explain briefly why the work done by a fielder when he takes a catch in a cricket match is negative.
Give reasons for the following A teacher moving around in the class is doing work but a child standing and reading a book is not doing any work.
A car is running at a speed of 15 km h-1 while another similar car is moving at a speed of 45 km h-1. Find the ratio of their kinetic energies.
Give one example in which a force does zero work.
The work done on an object does not depend on the :
Why is the work done on an object moving along a circular path zero?
Write an expression for work done by a force depends?
A block of iron of mass 400 kg is used as a pile driver. If it is raised to a height of 20 meters, calculate the potential energy possessed by the iron block. (Assume g= 10 ms-2).
A bullet of mass 25 g has a velocity of 600 ms-1. What is the kinetic energy of the bullet? If it penetrates 50 cm into a target, find the resistive force offered by the target.
