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प्रश्न
Why is it easier to open a door by applying the force at the free end of it?
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उत्तर १
It is easier to open a door by applying the force at the free end of it because of the larger the perpendicular distance, less is the force needed to turn the body.
उत्तर २
If we open or shut a door, we need to apply less force at the free end because according to the formula of the moment of force
M = Force × Perpendicular distance of force from axis of rotation
The magnitude of the force is inversely proportional to the perpendicular distance of force from the axis of rotation. Thus, as the distance between the point of force application and hinge will increase, the amount of force required to open the door will decrease.
संबंधित प्रश्न
Define the term Force?
Give one example in the given cases:-
A force changes the size of a body
Prove the force = mass x acceleration. State the condition when it holds.
How can you feel a force of 1 N?
Which of the following is not the force at a distance:
(a) electrostatic force
(b) gravitational force
(c) frictional force.
(d) magnetic force.
A body of mass 1 kg is thrown vertically up with an initial speed of 5 m s-1. What is the magnitude and direction of force due to gravity acting on the body when it is at its highest point? Take G = 9.8 n kg-1
How much acceleration will be produced in a body of mass 10 kg acted upon by a force of 2 kgf?(g = 9.8 ms-2)
A force od 10 kgf is applied on a body of mass 100 g initially at rest for 0.1 s calculate:
a) the momentum acquired by the body
b) the distance travelled by the body in 0.1s. Take g = 10 N kg-1
Define an Inclined plane.
Give two examples to verify that a force tends to change the static condition of a body.
