Question
Fri April 18, 2014

# Can I have the definition for torque.

Sat April 19, 2014
Torque is a measure of how much a force acting on an object causes that object to rotate.
Mathematically, Torque is defined as

= r x F = r F sin()

In other words, torque is the cross product between the distance vector (the distance from the pivot point to the point where force is applied) and the force vector, '' being the angle between r and F.
Using the right hand rule, we can find the direction of the torque vector. If we put our fingers in the direction of r, and curl them to the direction of F, then the thumb points in the direction of the torque vector.

Related Questions
Mon July 17, 2017

# This is the answer of question 15 in selina physics class 10 solutions which you have given. What is the reason of force being applied in this direction only? To lift up the wheel on the platform, Point X will become the point of rotation of the wheel. Why can't the force be applied at the diameter of the wheel so that the perpendicular distance of the line of action of force from the axis of rotation is maximum? This is one of the factors affecting torque. Torque is directly proportional to the perpendicular distance of the line of action of force from the axis of rotation. Therefore, by applying the force at the diameter, the perpendicular distance increases and due to this, the moment of force also increases. therefore, by applying minimum effort, the wheel can be raised.

Tue July 11, 2017