A child with a mass of 30 kg is standing on a spring scale in an...
A child with a mass of 30 kg is standing on a spring scale in an elevator. If the spring scale reads 360 N, what are the magnitude and direction of the acceleration of the elevator at this time? The acceleration due to gravity is 10 m/s2.
Homework Answers
real weight =mg=30*10=300N
given weight =360N
given weight>real weight
so the elevator must be moving in downward direction
m(g+a)=360
30(10+a)=360
acceleration =2m/sec^2 ,downward direction
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