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प्रश्न
Give two examples of a couple's actions in our daily life.
उत्तर
For example, turning a key in a lock and turning a steering wheel.
APPEARS IN
संबंधित प्रश्न
In a door, handle is provided ......... from the hinges.
The steering wheel of a vehicle is of large diameter.
It is easier to open the door by pushing it at its free end.
A potter turns his wheel by applying a force through the stick near the rim of wheel.
Name and define the S.I and C.G.S unit of force. How are they related?
The diagram shows two forces F1 = 5 N and F2 = 3N acting at point A and B of a rod pivoted at a point O, such that OA = 2m and OB = 4m
Calculate:
- Moment of force F1 about O
- Moment of force F2 about O
- Total moment of the two forces about O.
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 for each of the following uses of a machine:
to change the point of application of force
State two factors affecting the turning effect of a force.
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.
