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प्रश्न
How is work done by a force measured when the force is in an angle to the direction of displacement?
उत्तर
When the displacement is in the direction making an angle θ with the direction of force,
Work done = Component of force in the direction of displacement x displacement
∴ W = F × S cos θ
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संबंधित प्रश्न
How is the work done by a force measured when the force is in the direction of displacement?
A force F acts on a body and displaces it by a distance S in a direction at an angle θ with the direction of force.
Write the expression for the work done by the force.
A body is acted upon by a force. State two conditions when the work done is zero.
Choose one or more correct alternatives.
While dragging or lifting an object, negative work is done by ______.
- the applied force
- gravitational force
- frictional force
- reaction force
A force F acts on a body and displaces it by a distance S in a direction at an angle θ with the direction of force.
What should be the angle between force and displacement so that the work done is
- Zero
- Maximum
Explain the following concept in your own words with everyday examples:
Displacement
A force of 1000 N was applied to stop a car that was moving with a constant velocity. The car stopped after moving through 10 m. How much is the work done?
A cart with mass 20 kg went 50 m in a straight line on a plain and smooth road when a force of 2 N was applied to it. How much work was done by the force?
What should be the angle between the direction of force and the direction of displacement, for work to be negative?
A force 'F' moves a load from A to C as shown in the figure below. For the calculation of the work done, which of these lengths would you use as the displacement?
