ando
If Two objects, both travelling in a vacuum, go from point A to B, but one object travels twice as fast - does that take more, less or the same ammount of energy?
You don't apply energy to things. You apply forces.Originally posted by MrCaN
The speed at which a object moves is dependent on the energy applied to it.
Originally posted by ando
If Two objects, both travelling in a vacuum, go from point A to B, but one object travels twice as fast - does that take more, less or the same ammount of energy?
The statement "both travelling in a vacuum" implies that both objects have a nonzero starting velocity at point A. Therefore it requires no energy for either to get to point B, assuming that point B is along a direct line from point A coincidental to both trajectories. See Newton's 1st law - inertia: particle in motion will remain in motion unless there is a force acting upon it.ando asked:
If Two objects, both travelling in a vacuum, go from point A to B, but one object travels twice as fast - does that take more, less or the same ammount of energy?
No. In the first place it doesn't take any energy whatsoever to go from one place to another unless there is a force acting on the object. In an inertial frame of referance in the absence of an applied force the energy required to go from one place to another is zero. That means that one does not have to expend at non-zero net amount of energy to make this happen.Originally posted by ando
If Two objects, both travelling in a vacuum, go from point A to B, but one object travels twice as fast - does that take more, less or the same ammount of energy?
To answer this question, you really have to examine the mechanism behind walking and running. In both, one leg swings forward, while the other pushes backwards, until the forward leg hits the ground, then it starts moving backward, and the backward leg starts moving forward. Each leg has to come to a complete stop(if even for an instant) before it can reverse direction.Originally posted by ando
Basically I don't know what I'm talking about and I really didn't know what I was asking. I really just wanted to know if walking a mile on planet earth burns more, less, or the same ammount of energy as running a mile.
My friend says that if you take a step, it doesn't matter wether you do it fast or slowly, it burns the same ammount of energy.]