A 70 kg person is standing in an elevator when the elevator begins accelerating upwards at a rate of 1.5 ��/��ଶ. With what force does the elevator floor exert on the woman’s feet?
For these elevator problems, F = m*(g ± a)
+ if accelerating upward, - if accelerating downward
so here, F = 70kg * (9.8 + 1.5)m/s² = 791 N ≈ 790 N
F = m(g+a) = 70(9.806*1.5) = 790 N (just 2 sign. digits)
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For these elevator problems, F = m*(g ± a)
+ if accelerating upward, - if accelerating downward
so here, F = 70kg * (9.8 + 1.5)m/s² = 791 N ≈ 790 N
F = m(g+a) = 70(9.806*1.5) = 790 N (just 2 sign. digits)