Calculate the force a mother must exert to hold her 12.0 kg child in an elevator

Question

(a) The elevator accelerates upward at 0.850 m/s2.
1           N
Calculate the ratio of this force to the weight of the child.
2?          

(b) The elevator moves upward at a constant speed.
3           N
Calculate the ratio of this force to the weight of the child.
4?     

(c) The upward bound elevator decelerates at 2.30 m/s2.
5           N
Calculate the ratio of this force to the weight of the child.
6?     

Explanation / Answer

4.

ratio of this force to the weight of the child. = 117.72/(12*9.8) = 1

5.

ratio of this force to the weight of the child. = 90.12/(12*9.8) = 0.766

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