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प्रश्न
The hand flour grinder is provided with a handle near the rim.
Explain the following:
The handle of hand flour grinder (chakki) is provided near its edge.
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उत्तर
The stone of hand flour grinder is provided with a handle near its rim (i.e., at maximum distance from centre) so that it can easily be rotated about the iron pivot at its centre by applying a small force at the handle.
संबंधित प्रश्न
Name the factors affecting the turning effect of a body
Where can a body execute free vibrations?
A half metre rod is pivoted at the centre with two weights of 20gf and 12gf suspended at a perpendicular distance of 6 cm and 10 cm from the pivot respectively as shown below.
1) Which of the two forces acting on the rigid rod causes clockwise moment?
2) Is the rod in equilibrium?
3) The direction of 20 kgf force is reversed. What is the magnitude of the resultant moment of the forces on the rod?
A force always produces both the linear and turning motions.
How does the effect of force differ when it is applied on a rigid body?
State the effect of force F in of the following diagram.
A potter turns his wheel by applying a force through the stick near the rim of wheel.
A spanner of length 10 cm is used to open a nut by applying a minimum force of 5.0 N. Calculate the moment of force required.
A spanner of length 10 cm is used to open a nut by applying a minimum force of 5.0 N. Calculate the moment of force required.
A wheel of diameter 2 m can be rotated about an axis passing through its center by a moment of force equal to 2.0 Nm. What minimum force must be applied on its rim?
State one factor on which the magnitude of a non-contact force depends. How does it depend on the factor stated by you?.
State one way to reduce the moment of given force about a given axis of rotation.
A, B and C are the three forces each of magnitude 4 N acting in the plane of the paper as shown in Figure. The point O lies in the same plane.
- Which force has the least moment about O? Give a reason.
- Which force has the greatest moment about O? Give a reason.
- Name the forces producing
(a) Clockwise
(b) anticlockwise moments. - What is the resultant torque about the point O?
A body is acted upon by two forces of magnitude F but in opposite directions. State the effect of the force if both forces act at the same point of the body.
Classify the following amongst contact and non-contact forces.
gravitation force
Define couple.
A wheel of diameter 3 m is shown in fig. 2 with axle at 0. A force F = 8 N is applied at Q in the direction shown in figure. Calculate the moment of force about:
(i) centre o, and
(ii) point p.
State two factors affecting the turning effect of a force.
State one factor on which the magnitude of a non-contact force depends. How does the magnitude of a non-contact force change along with distance?
A uniform metre scale is balanced at a 40 cm mark when weights of 20 gf and 5 gf are suspended at 5 cm mark and 75 cm mark respectively. Calculate the weight of metre scale.
