6. A 73-kg woman stands on a scale in an elevator. The

scale reads 810 N. What is the magnitude and

direction of the elevator's acceleration?

A. 0.23 m/s2 up

B. 1.3 m/s2 up

C. 6.5 m/s2 down

D. 11 m/s2 down

b

Explanation:

n = m (g + a)

n = normal force (N)

m=mass (kg)

g=acceleration of gravity

a = acceleration of elevator

rearrange:

a = n/m - g

a = (810 N/73 kg) - 9.8 m/s ^2

a = 1.3 m/s ^2 up

and the acceleration is upwards bc her weight is less than the scale reading