You leave the doctor\'s office after your annual checkup and recall that you wei

Question

You leave the doctor's office after your annual checkup and recall that you weighed 686 { m N} in her office. You then get into an elevator that, conveniently, has a scale. Find the magnitude and direction of the elevator's acceleration if the scale reads

Find the magnitude of the elevator's acceleration if the scale reads 727 { m N}. in m/s^2

Find the direction of the elevator's acceleration if the scale reads 727 { m N}. (Up or down)

Find the magnitude of the elevator's acceleration if the scale reads 593 { m N}. in m/s^2

Find the direction of the elevator's acceleration if the scale reads 593 { m N}. (Up or down)

and I need some help with this problem

v = 7.82m/s

a=49.3m/s^2

E)Use Newton's laws and the results of part B to calculate the force the ground exerts on him while he is slowing down. Express this force in newtons.

I used F=MA and got 3667N but its not right

F)Use Newton's laws and the results of part to calculate the force the ground exerts on him while he is slowing down. Express this force as a multiple of the man's weight.

im assuming answer above/(ma)

G)What is the magnitude of the reaction force to the force you found in part E? (no clue)

Explanation / Answer

Actual weight W = 686 N Mass of you M = W/g                         = 686 / 9.8                         = 70 kg Scale reading R = 727 N We know R = W + Ma From this accleration a = ( R-W) / M                                    = 0.5857 m / s 2 (b). Upwards (c).Scale reading R ' = 593 N We know R ' = W -Ma ' From this accleration a ' = (W-R') / M                                      = 1.328 m / s 2 (d).Downwards

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