Changes

In [[classical physics]], '''force''' is defined as the rate of change of momentum with respect to time (i.e. the [[derivative]] of momentum with respect to time.) In many everyday scenarios where the speed of a body is much less than that of [[speed of light|light]] (non-[[relativistic]]), and the [[mass]] of the body is constant, it simplifies to the product of [[mass]] and [[acceleration]]. In other words, how hard you push on something determines how rapidly you change its speed. Of course, the heavier it is, the more it resists this change.

In [[classical physics]], '''force''' is defined as the rate of change of momentum with respect to time (i.e. the [[Derivative (calculus)|derivative]] of momentum with respect to time.) In many everyday scenarios where the speed of a body is much less than that of [[speed of light|light]] (non-[[relativistic]]), and the [[mass]] of the body is constant, it simplifies to the product of [[mass]] and [[acceleration]]. In other words, how hard you push on something determines how rapidly you change its speed. Of course, the heavier it is, the more it resists this change.

Using mathematics, force may be defined as the time rate of change of [[momentum]] of a body <math>\vec F = {d \vec p \over dt} </math>. The [[International System of Units|SI]] unit of force is the [[newton (unit)|newton]] and the [[US customary system]] unit is the pound.

Using mathematics, force may be defined as the time rate of change of [[momentum]] of a body <math>\vec F = {d \vec p \over dt} </math>. The [[International System of Units|SI]] unit of force is the [[newton (unit)|newton]] and the [[US customary system]] unit is the pound.