What is torque equal to

So, in this case, the torque is also zero. Think of a hinged door. If you push on the edge of the door, towards the hinge, the door doesn't move because the torque is zero.

Example 3 is the general case in which the force is applied at some angle a to the arm. The perpendicular distance is given by trigonometry as the length of the arm L times the cosine cos of the angle.

The torque is then given by:. Examples 1 and 2 can be derived from this general formula, since the cosine of 0 degrees is 1. In Example 4, the pivot has been moved from the end of the bar to a location near the middle of the bar. Weights are added to both sides of the pivot. To the right a single weight W produces a force F1 acting at a distance L1 from the pivot. This creates a torque T1 equal to the product of the force and the distance. The direction of the torque vector depends on the direction of the force on the axis.

Anyone who has ever opened a door has an intuitive understanding of torque. The SI unit of electric dipole moment is Coulomb-meter. The simplest example is a pair of electric charges of two opposite signs and equal magnitude separated by distance.

Electric dipole moment. Because the net torque is equal to zero, the torques in Example 1 are balanced and acting in equilibrium. Torque is the twisting force that tends to cause rotation. When the sum of all torques acting on an object equals zero, it is in rotational equilibrium. Rotational collisions conserve angular momentum When objects collide without a net external torque, the angular momentum is constant.

The two objects exert equal, but opposite angular impulses upon each other to maintain the total angular momentum of the colliding system.

A scalar quantity has magnitude or size, examples: distance, speed. Vector quantities have both magnitude and direction, examples: force, velocity and field strength. Power applied on the wheel is 40 watts. Torque is equal to What is Speed? To assess torque vs speed truly, you must first understand speed in detail. Speed is nothing but the distance travelled by an object per unit of time. Speed is a scalar quantity. You do not need to establish the direction of movement to determine the speed of a body.

This is also what sets speed apart from velocity. Being a vector quantity, velocity is the speed of a body in a particular direction. Since torque is a rotatory motion, we can easily derive its relation to power by comparing the linear equivalent.

To determine the linear displacement, simply multiply the radius of movement with the angle covered. Magnetism Magnetic field Magnetic field strength Magnetic flux Magnetomotive force. Motion Acceleration Running Speed Wind speed. Radioactivity Absorbed dose Equivalent dose Radioactive decay. Time Pregnancy calendar Time Time zones.