A 55.0 kg girl weighs herself by standing on a scale in an elevator. What is the force exerted by the scale when the elevator is descending at a constant speed of 10 m/s?
What is the force exerted by the scale if the elevator is accelerating downward with an acceleration of 2.1 m/s2?
If the elevator's descending speed is measured at 10 m/s at a given point, but its speed is decreasing by 2.1 m/s2, what is the force exerted by the scale?
What is the force exerted by the scale if the elevator is accelerating downward with an acceleration of 2.1 m/s2?
If the elevator's descending speed is measured at 10 m/s at a given point, but its speed is decreasing by 2.1 m/s2, what is the force exerted by the scale?
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a) F = m*g = 55*9.8 = 539 N
b) F = m*(g+a) = 55(9.8 + (-2.1)) = 423.5 N
c) F = m*(g+a) = 55(9.8+2.1) = 654.5 N
b) F = m*(g+a) = 55(9.8 + (-2.1)) = 423.5 N
c) F = m*(g+a) = 55(9.8+2.1) = 654.5 N