A similar but separate notion is that of velocity, which the rate of change<span> of </span>position<span>. Example . If p(t) is the </span>position<span> of an </span>object<span> moving on a number line at time t (measured in minutes, say), then the average </span>rate of change<span> of p(t) is the average velocity of the </span>object<span>, measured in units per minute.</span>
<span> the </span>rate<span> at which an object </span><span>changes position. but if you need a number or a formula i need to know if its on a hill. what panet. what the object is. etc. etc. etc.
By definition we have that force=dP/dt, where p is momentum so <span>momentum is force*time p= 15*3 = 45 Ns , west. </span><span>the change in momentum of the object is 45 N.s</span>
The statement is implying that if you do a certain amount of work, you're entitled to do a certain amount of work. Sometimes, work doesn't entitle you a reward.
