Advertisements
Advertisements
Question
An engine does 54,000 J of work by exerting a force of 6000 N on it. What is the displacement in the direction of the force?
Solution
Given work done = 54,000J, force = 6000 N, 0 = 0°
Now work done = force x displacement x cos 0°
or displacement = `54000/6000` = 9m
APPEARS IN
RELATED QUESTIONS
Give the expression for mechanical advantage of an inclined plane in terms of the length of an inclined plane.
Draw a simplified diagram of a lemon crusher, indicting of load and effort
What do you mean by a centrifugal force?
Work is a scalar quantity because it is a measure of transfer of energy without indicating any direction
Work done by a force is equal to the product of ....... and ....
State the condition when the work done by a force is negative. Explain with the help of examples.
A boy takes 3 minutes to lift a 20 litre water bucket from a 20 m deep well, while his father does it in 2 minutes. Compare:
- the work, and
- power developed by them.
Define one newton. Write the relation between the S. I. unit and the C.G.S. unit of force.
What is the S.I. unit of work? Define it.
For the following scenarios, state whether the work done by gravity is positive, negative, or zero.
A person climbs a ladder.
