Advertisements
Advertisements
Question
Is work done a scalar or a vector physical quantity?
Solution
Work is a scalar quantity because it is a measure of transfer of energy without indicating any direction.
APPEARS IN
RELATED QUESTIONS
A coolie does no work against the force of gravity while carrying a luggage on a road.
Differentiate between energy and power.
A boy weighing 25 kgf climbs up from the first floor at height 3 m above the ground to the third floor at height 9m above the ground. What will be the increase in his gravitational potential energy? (Take g = 10 N kg -1)
What do you mean by degradation of energy?
Is work a scalar or a vector quantity?
Write the formula for work done on a body when the body moves at an angle to the direction of force. Give the meaning of each symbol used.
Explain by an example that a body may possess energy even when it is not in motion.
How much work is done when a force of 1 N moves a body through a distance of 1 m in its own direction?
When do we say that work is done? Write the formula for the work done by a body in moving up against gravity. Give the meaning of each symbol which occurs in it.
A force of 50 N acts on a body and moves it a distance of 4 m on horizontal surface. Calculate the work done if the direction of force is at an angle of 60° to the horizontal surface.
Why is the work done on an object moving with uniform circular motion zero?
What is meant by a translational motion? Give one example.
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?
A body does 20 J of work in 10 s. What is its power?
Define Translational motion.
Name the material commonly used for the manufacturing of solar cells.
________ is said to be done when a force is acting on it.
State whether work is done or not, by writing yes or no, in the following case:
A man pushes a wall.