Advertisements
Advertisements
Question
Why is it easier to open a door by applying the force at the free end of it?
Advertisements
Solution 1
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.
Solution 2
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.
RELATED QUESTIONS
Give one example in the given cases:-
A force moves a stationary body
Complete the following sentence:
Mass X change in velocity = ............x time interval.
Complete the following sentence:
The mass of a body remains constant till the velocity of the body is ..........
Define Newton (the S.I unit of force)
Explain what is understood by the following statement 1 kilogram-force (kgf) - 9.8 newton
How can you feel a force of 1 N?
A cricket ball of mass 100 g strikes the hand of a player with a velocity of 20 ms-1 and is brought to rest in 0.01 s calculate
1) the force applied by the hand of the player.
2) the acceleration of the ball
Define contact forces.
If we apply force against the direction of motion of the body, then the body will
Two identical bullets are fired one by a light rifle and another by a heavy rifle with the same force. Which rifle will hurt the shoulder more and why?
