What are the units of (a) work, and (b) energy ?
What are the units of (a) work, and (b) energy ?
(a) WORK
The work is the product of the force and the displacement. In SI (international system) units, the unit of force is the Newton (N), and the unit of distance or displacement is the meter (m). Therefore, the unit of work can be expressed as a Newton-meter, N∙m.
(b) ENERGY
The kinetic energy (K) of an object is equal to the amount of work that is required to accelerate the object from rest to a certain velocity, v. This relationship between kinetic energy and work is called the work-energy theorem. The kinetic energy of an object is a scalar value, meaning it does not depend on the direction the object moves in. The value of kinetic energy is always positive or zero. The unit of kinetic energy is the same as the unit of work, the Joule (J).
(a) WORK
The work is the product of the force and the displacement. In SI (international system) units, the unit of force is the Newton (N), and the unit of distance or displacement is the meter (m). Therefore, the unit of work can be expressed as a Newton-meter, N∙m.
(b) ENERGY
The kinetic energy (K) of an object is equal to the amount of work that is required to accelerate the object from rest to a certain velocity, v. This relationship between kinetic energy and work is called the work-energy theorem. The kinetic energy of an object is a scalar value, meaning it does not depend on the direction the object moves in. The value of kinetic energy is always positive or zero. The unit of kinetic energy is the same as the unit of work, the Joule (J).
