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A runner with a mass of 81 kg accelerates from 0 to 6 m/s in 6 seconds. Find the net force on the runner using the alternate form of Newton's second law.

Answer :

Final answer:

The net force on the 81 kg runner, who accelerates from 0 to 6 m/s in 6 seconds, can be found using Newton's second law of motion. This law is expressed as F=ma, where 'F' is the force, 'm' is the mass, and 'a' is the acceleration. By substituting the given values, the net force on the runner is 81 Newtons.

Explanation:

The subject of this question is Physics, specifically involving the principle of Newton's second law of motion. This law states that the force exerted on an object is equal to its mass times its acceleration, which can be expressed as F=ma, where 'F' is the force, 'm' is the mass and 'a' is the acceleration. In the case of the runner, a person with a mass of 81 kg is accelerating at a rate of (6 m/s - 0 m/s) / 6 s which equals 1 m/s2.

Therefore, by substituting 81 kg for 'm' and 1 m/s2 for 'a' in the formula, we can calculate the net force on the runner as 81 kg * 1 m/s2, which equals 81 Newtons.

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