Advertisements
Advertisements
प्रश्न
Define couple.
उत्तर
Two equal and opposite forces acting perpendicular and separated by some distance d is called a couple.
A couple of causes are pure rotation.
APPEARS IN
संबंधित प्रश्न
What is the SI unit of the moment of force?
In Fig. a force F is applied in a direction passing through the pivoted point O of the body. Will the body rotate? Give reason to support your answer.
A car of mass 600 kg is moving with a speed of 10 ms-1 while a scooter of mass 80 kg us moving with a speed of 50 ms-1. Compare their momentum.
Is moment of force a scalar or a vector?
It is easier to turn the steering wheel of a large diameter than that of a small diameter. Given reason.
Two forces each of magnitude 10 N act vertically upwards and downwards respectively at the two ends A and B of a uniform rod of length 4 m which is pivoted at its midpoint O as shown in the figure. Determine the magnitude of the resultant moment of forces about the pivot O.
Give an example of the following uses of a machine:
to change the direction of force
What is the work done when no net force is applied on the body?
Define non-contact forces.
Assertion & Reasoning
- Assertion: The sum of the clockwise moments is equal to the sum of the anticlockwise moments.
- Reason: The principle of conservation of momentum is valid if the external force on the system is zero.