## What is the formula for work (MCAT Physics MCQ)

**QUESTION: What is the formula for work?**

## ANSWER: Work = Force X Distance (W = Fd)

**FORMULA #1**

More specifically: If a force **F** that is constant with respect to time acts on an object while the object is displaced in a straight line along the length and direction of a vector **d**, the mechanical work done by the force on the object is the dot product of the vectors **F** and **d**:

**FORMULA #2
In** physics,

**work**is the amount of energy transferred to a body by a force acting through a distance in the direction of the force. Like energy, it is a scalar quantity, with SI units of joules. According to the

**work-energy theorem**, if one or more external forces act upon a rigid object, causing its kinetic energy to change from

*E*to

_{k1}*E*, then the mechanical work (

_{k2}*W*) done by the net force is equal to the change in kinetic energy. For translational motion, the theorem can be specified as:

^{[3]}

where *m* is the mass of the object and *v* is the object’s velocity.

**Youtube videos on Work and Energy**

**NEXT QUESTION:** Determine the amount of work that would be performed by a constant horizontal 25 Newton force if that force pushed a 75 kilogram rock 15 meters across a horizontal surface.

Source: http://en.wikipedia.org/wiki/Work_%28physics%29

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