Janice has just measured the density of an object. Which value is possible? (Density: D = )
2 answers:
Answer:
Explanation:
as we know that density is the ratio of mass and volume of the object
here we know that mass as well as volume both are always positive so the ratio of both can not be negative.
so we know that mass is measured in gram and volume is measured in cubic cm
so the density is measured in
so the correct answer must be positive and in terms of above units
so we have
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Answer:
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Explanation:
The centripetal acceleration acts on a body when it is performing a circular motion.
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The centripetal acceleration of a point moving with a velocity and at a distance of
from the axis of rotation is given as:
Here,
∴
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Answer:
The tension force in the supporting cables is 7245N
Explanation:
There are two forces acting on the elevator: the force of gravity pointing down (+) with magnitude (elevator mass) x (gravitational acceleration), and the tension force of the cable pointing up (-) with an unknown magnitude F. The net force is the sum of these forces:
We are given the resulting acceleration along with the mass, i.e., we know the net force, allowing us to solve for F:
The tension force F in the supporting cables is 7245N