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Chapter 1: Q4-34DQ (page 123)

If you squat down (such as when you examine the books on a bottom shelf) and then suddenly get up, you may temporarily feel light-headed. What do Newton鈥檚 laws of motion have to say about why this happens?

Short Answer

Expert verified

Light-headedness is caused while suddenly getting up from squatting position due to inertia of rest.

Step by step solution

01

Concept of inertia of rest

A body in rest tends to be in rest unless an external force acts on it.

02

Reason for feeling light headed when suddenly getting up

While squatting the whole body along with the blood inside are at rest. While suddenly getting up, the blood inside tend to stay at rest in the bottom position due to inertia of rest. This results in less blood in the brain for some time which causes the light-headedness.

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