Answer:
Safety
Explanation:
As we know that safety is very important before doing anything .This is also a important part of the human needs.Every human wants both emotional and physical safety from his job or whatever is doing.
Maslow's given a Hierarchy of Needs and the second tier of this Hierarchy is safety.
So the answer of the given question is safety.
Answer:
v = 14 m/s
Explanation:
given,
radius of dip = 40 m
The passengers in a roller coaster car feel 50% heavier than their true weight.
Apparent weight



When the car is at the bottom, the weight will be acting downwards and the centripetal force will also be acting downward where as Normal force which is apparent weight will be acting in upward direction.
now,





v = 14 m/s
If i'm wrong sorry but i think it is 24hrs