When trying to turn a key into a lock, following is applied
A. Coplanar force
B. Non-coplanar forces
C. Moment
D. Couple
Answer: Option D
Solution (By Examveda Team)
Imagine you're trying to open a door with a key.You're not just pushing or pulling straight (that would be a force).
Instead, you're twisting the key.
This twisting action is what we call a moment in engineering.
A moment is a turning effect caused by a force acting at a distance from a pivot point (in this case, the center of the lock).
It's like a force trying to rotate something.
So, the correct answer is a moment because it describes the turning action you apply to the key in the lock.
Coplanar forces act in the same plane, which isn't what happens when you turn a key.
Non-coplanar forces act in different planes, also not applicable here.
A couple is two equal and opposite parallel forces, which also doesn't represent the action of turning a key.
This Question Belongs to Civil Engineering >> Strength Of Materials
Explanation:
Jab aap chabi ko ghumane ki koshish karte hain, aap ek force lagate hain jo chabi ke center of rotation (pivot point) se kisi distance par lagti hai.
Iska result ek turning effect ya moment hota hai.
Moment ka formula hota hai:
Moment
=
Force
×
Perpendicular Distance from Pivot Point
Moment=Force×Perpendicular Distance from Pivot Point
Misal:
Sochiye aap ek lock me chabi daal kar force lagate hain.
Agar force ko zyada distance par lagaya jaye (jaise chabi ke handle ke end par), to lock ko ghumana asaan ho jata hai.
Yahi moment ka principle hai jo rotational motion paida karta hai.
Why Not Others?
A. Coplanar Force: Yeh sirf tab hota hai jab sab forces ek plane me ho, lekin lock ghumane ke liye rotational effect zaruri hai.
B. Non-Coplanar Forces: Yeh 3D forces hote hain, jo yahan relevant nahi hain.
D. Couple: Couple tab hota hai jab do equal aur opposite forces lagte hain, lekin chabi ghumane me aap ek single force lagate hain.
Isliye, Moment correct jawab hai.
Answer is moment
Moment