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
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A sailboat is moving due to wind energy.
Derive a relationship between S.I. and C.C.S. unit of work
A boy tries to push a truck parked on the roadside. The truck does not move at all. Another boy pushes a bicycle. The bicycle moves through a certain distance. In which case was the work done more : on the trick or on the bicycle? Give a reason to support your answer.
Determine the amount of work done when an object is displaced at an angle of 30° with respect to the direction of the applied force.
What is meant by a translational motion? Give one example.
What is the work done against gravity when a body is moved horizontally along a frictionless surface?
Write an expression for work done by a force depends?
A girl of mass 50 kg runs up a flight of 40 steps in 20 seconds. If each step in 20 cm high, calculate the power developed by the girl. (g= 10 ms-2).
Define Translational motion.
