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  1. ... calculating power, we are intended to measure the " action " power. If we take the reaction into account, it will result in the conservation of energy, always zero balance...

  2. ...ii) Average speed = Total distance travelled / total time taken = 100 / 13.6 = 7.35m/s ( cor. to 3 s.f. ) b) The speed of B after...

  3. ... average power as follows: Time of action of the man's force = 3.16 s Velocity of the...10 × 10 sin 30° = 500 J Work done against friction = 10 × 10 = 100 J So total energy output...

  4. ... such, he needs to exert some force against this [resistance force] in order to continue ...the ground. Imagine if you take the [man and box] as a [system], then the action -reaction pair mentioned above becomes...

  5. ...clear that these parks may be the elephant's last hope against the rapidly changing world around them. ...mostly due to international and local pressure. Without action , it is predicted that the elephant population in...

  6. ... mechanical stress. Triboelectricity: electric charge taken on by contact or friction between two different materials...transmit information by electrical impulses known as action potentials.