Editing Torque
Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.
The edit can be undone.
Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.
| Latest revision | Your text | ||
| Line 1: | Line 1: | ||
== Explanation == | == Explanation == | ||
| − | Torque is defined as a turning or rotating force that makes the object rotate about a fixed axis. A good example for torque is a human spinning a bicycle wheel around its axis by applying a force on its outer surface. The force applied on the outer tire multiplied by the radius of the wheel from its | + | Torque is defined as a turning or rotating force that makes the object rotate about a fixed axis. A good example for torque is a human spinning a bicycle wheel around its axis by applying a force on its outer surface. The force applied on the outer tire multiplied by the radius of the wheel from its center of mass gives the torque. Torque is denoted by the symbol '''τ'''. It is measured in SI units as newton meter '''Nm'''. |
== Frequently Asked Questions == | == Frequently Asked Questions == | ||
=== How is torque different from work? === | === How is torque different from work? === | ||
| − | Though torque and work have same units of newton | + | Though torque and work have same units of newton meter, they are totally different entities. Work is defined as the amount of energy needed to translate an object through a certain distance by applying a force on it. On the other hand, torque is a force applied on an object at a certain distance from its center of mass, which spins the object about an axis. The rotational counterpart for work is actually known as rotational work, which is defined as the amount of energy required in applying a torque to rotate an object through a certain angle. |
=== How is rotational work calculated? === | === How is rotational work calculated? === | ||
| Line 11: | Line 11: | ||
'''W = F × d''' | '''W = F × d''' | ||
| − | For a rotational system, the same can be expressed as the energy needed to apply a constant torque '''τ''' to rotate the object through a | + | For a rotational system, the same can be expressed as the energy needed to apply a constant torque '''τ''' to rotate the object through a certain angle '''θ'''. |
'''W<sub>rotational</sub> = τ × θ''' | '''W<sub>rotational</sub> = τ × θ''' | ||
=== What is the difference between static torque and dynamic torque? === | === What is the difference between static torque and dynamic torque? === | ||
| − | Static torque is the force applied to a rotational object where the angular velocity of it is constant | + | Static torque is the force applied to a rotational object where the angular velocity of it is constant and no angular acceleration or deceleration is involved. On the contrary, a dynamic torque is a force applied to the rotational system where it accelerates over time. |