![]() It can be calculated as the difference between its final value and its initial value. ∆ p →: Represents the variation of the linear momentum produced in the considered time interval.∆ t: It is the time interval during which the force is acting.F →: It is the resultant force or total force to what the body is subdued, supposedly constant.J →: It is the total impulse the body is subdued, the impulse of the resultant force.The longer the force applied is, the higher the speed we can get is. So, it seems clear that if we want to give a specific velocity to a body we have two options: to apply a bigger force during a shorter interval of time or, a smaller force during a longer interval of time. Players do what we know as gather momentum. Have you ever ask yourself, why football players put the ball behind their heads to throw-in? That gesture does not increase considerably the value of the force to throw the ball but, however, it will let the players to exert the same force during more time. ![]() Gather momentum!, let´s get started! Concept In this chapter we are going to study it through the following points: It let us understand, for example, the mechanism of takeoff of the space shuttles, but also why football players put the ball behind their heads for the throw-in. Impulse is the magnitude we use in dynamics to relate the force applied on a body to the time the force has been applied.
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