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प्रश्न
Give an example of the following uses of a machine:
to change the direction of force
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उत्तर
A pulley is used to change the direction of application of force.
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संबंधित प्रश्न
Name the factors affecting the turning effect of a body
State Newton's first law of motion. Why is it called the law of inertia?
State the condition when the change in the momentum of a body depends only on the change in its velocity.
Calculate the acceleration produced in a body of mass 50 g when acted upon by a force of 20 N.
A nut is opened by a wrench of length 10 cm. if the least force required is 5.0 N. find the moment of force needed to turn the nut.
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.
A uniform metre rule of weight 10gf is pivoted at its 0 mark.
What moment of force depresses the rule?
Give an example for each of the following uses of a machine:
to change the point of application of force
Calculate the magnitude of the force of a couple, when the arm of the couple is 63 cm and the moment of the couple is 21 Nm.
