(a) Explain the statement the acceleration of free fall cohesion. (b) State two factors that can affect the value of the narrow glass tube has a concave men...
Question 1 Report
(a) Explain the statement the acceleration of free fall cohesion.
(b) State two factors that can affect the value of the narrow glass tube has a concave meniscus while acceleration of free fall at a place.
Answer Details
The OCR text of this question is partly garbled; the coherent physics content is about the acceleration of free fall, answered below.
(a) Meaning of "the acceleration of free fall at a place is \(9.8\ \text{m s}^{-2}\)"
It means that a body falling freely under gravity alone (with no air resistance) at that place has its velocity increasing at a constant rate of \(9.8\ \text{metres per second every second}\); that is, each second its downward speed increases by \(9.8\ \text{m s}^{-1}\).
(b) Two factors that affect the value of the acceleration of free fall at a place
- The latitude (distance from the equator) - \(g\) is greater at the poles than at the equator because the Earth is not a perfect sphere and because of the Earth's rotation.
- The altitude / height above sea level (distance from the Earth's centre) - \(g\) decreases as one goes higher above the Earth's surface.
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