Question

what is the physical significance of torque

Answer 1

Torque in rotational motion is same as force in linear motion!
All it does is include the angular rotation. Otherwise torque is the force that would cause displacement.

Answer 2

Answer:  

Torque is the measure of the force that can cause an object to rotate about an axis. Force is the causes an object to accelerate in the linear kinematics. Similarly, torque is what causes an angular acceleration. Hence, torque can be defined as the rotational equivalent of linear force. The point where the object rotates is called the axis of rotation.

Torque can either be static or dynamic. Static torque is a torque that does not produce an angular acceleration. A few examples of static torque are as follows:

• A person pushing a closed-door is applying a static door because the door isn’t rotating despite the force applied.

• Pedaling a cycle at a constant speed is also an example of static torque as there is no acceleration.

Torque calculation: A simple way to calculate the magnitude of the torque is to first determine the lever arm and then multiply it times the applied force.

Now, from the above observation, we conclude that torque produced depends on the magnitude of the force and the perpendicular distance between the point about which torque is calculated and the point of application of force. So, mathematically torque is represented as

τ=F.r sinФ

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