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Suppose that your mass is 59.1 kg, and you are standing on a scale fastened to the floor of an elevator. The scale measures force and is calibrated in newtons. What does the scale read when the elevator is rising and its speed is decreasing at a rate of 6.87 m/s2? Use 9.80 m/s2 for acceleration due to gravity.

Respuesta :

Answer:

173.2 Newtons

Explanation:

Since the scale is a reading of the normal force, the force of gravity and the normal force are in opposite directions, which means the forces can be subtracted from each other. In this situation, we can use Newtons 2nd Law: Net Force =(mass)( acceleration). The net force in this situation would be the Force of Gravity minus the Normal Force. So the equation you will begin with is Fg(which is mg) -  Normal Force = ma. We want the normal Force, so our new equation derived for Fnormal will be mg - ma = Fnormal.

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