Advertisements
Advertisements
Question
Why is the work done on an object moving along a circular path zero?
One Line Answer
Advertisements
Solution
This is because at each point of the circular path, the displacement is perpendicular to the force, which is directed towards the centre, along the radius.
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Write the expression for work done by a force.
When is work said to be done by a force?
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.
A man lifts a mass of 10 kg from the floor to a shelf 4 meter high. If g = 10 ms-2, what is the work done?
Name the physical quantity which is equal to the energy of a body.
Name the practical unit of power.
A horse exerts a pull on a cart of 300 N so that the horse-cart system moves with a uniform speed 18 km/h on a level road. Calculate the power developed by the horse in watt and also find its equivalent in horse power.
Name the physical quantity whose SI unit is Nm.
Name the CGS unit of work.
What are the advantages and disadvantages of using solar cells for producing electricity?
