During Cardiovascular Excercise, what do the heart and lungs do?
1 answer:
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Answer:
In statics condition and if is a body is over plane surface N = mg
In all cases which a body is on a ramp force N will be smaller than mg, and depending on the level of the ramp (bigger the ramp smaller force N)
Explanation:
See annex (Figure 1)
We can see with the help of force diagram the relation between N force and mg
Lets look first the body on the ramp assuming there is not movement
The sum of forces alog y axis = 0
mg* cos∠ BAC = N (normal force)
So N is always a fuction of mg and of the cosine of the inclination angle, and the cosine of angle varies from value 1 when the angle is 0 (look the case where the block is on the surface without inclination N = mg ).
And as the inclination increase the value of cosine will become smaller and so will N force which is directly proportional of cosine of the inclination angle
Therefore we can say that force N is always minor than mg unless in extreme case where the block is over the surface in which case N takes its maximum value N = mg
