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प्रश्न
It is easier to open the door by pushing it at its free end.
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उत्तर
Moment of force is a product of force and perpendicular distance.
Torque is defined as Force x distance. Larger the distance from the fixed axis or hinge, larger the torque and hence it is easier to open the door
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संबंधित प्रश्न
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?
Define force.
State Newton's first law of motion. Why is it called the law of inertia?
Calculate the acceleration produced in a body of mass 50 g when acted upon by a force of 20 N.
State one way to reduce the moment of given force about a given axis of rotation.
Give any two effects of a force on a non-rigid body.
Two similar vehicles are moving with the same velocity on the road, such that one of thus is loaded and the other one is empty which of the two vehicles will require larger force to stop?
Calculate the minimum distance between point of application of force and axis of rotation of a rigid body, if a force 125 N produces a moment of force of 25.75 Nm.
A person standing in front of a cliff fires a gun and hears its echo after 3 s. If the speed of sound in air is 336 ms−1.
- Calculate the distance of the person from the cliff.
- After moving a certain distance from the cliff, he fires the gun again, and this time the echo is heard 1.5 s later than the first. Calculate the distance that the person moved.
