Advertisements
Advertisements
Question
Explain, why submarines are able to dive underwater as well as a sail on the surface of the water?
Advertisements
Solution
Submarines are provided with ballast tanks. When required to dive, the water is allowed to enter the tanks. And when required to sail, the water is forced out by compressed air.
Work is a scalar quantity.
RELATED QUESTIONS
The S.I. unit of work is
No work is done by a force if the body
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.
When is the work done by a force on a body : (a) positive, (b) negative, and (c) zero?
Why is the work done on an object moving with uniform circular motion zero?
Give two examples of work done.
A body does 20 J of work in 10 s. What is its power?
One labourer carried four pans of road metal through a distance of 100 metres. If he carries two pans of road metal through a 200 metre distance ______ work will be done.
________ is said to be done when a force is acting on it.
