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If a body is moving at a constant speed, without friction, it does not absorb any energy, because it does not require any force to continue in a straight line. This follows from Newton's first law of motion. If there is friction or wind resistance, this does require a force to overcome it, but you haven't given any data to enable me to calculate this.
On the other hand, the definition of the force called the Newton in the SI system is that a force of 1 Newton will accelerate a mass of 1 Kg at a rate of 1 meter/sec2. I assume you know the difference between velocity and acceleration. If a body is accelerating it does need a force to do this, and energy or work is Force x Distance, the units being Joules, ie 1 Joule = 1 Newton x 1 meter. So in the above case, of a force of 1 Newton acting on a body and causing it to accelerate, the work done for every meter travelled is 1 Joule.
Wiki User
∙ 15y ago
Wiki User
∙ 12y agoPower = energy change / time
Take g = 10 m/s/s
>
change in (potential) energy = mgh = 100 * 10 * 3 = 3000 joules
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Power = energy change / time
>
= 3000 / 2
= 1500 watts
Wiki User
∙ 8y agoforce = mass × acceleration
Energy = force × distance
≈ 1 kg × 9.81 m/s² × 1 m
= 9.81 Joules.
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