MCQ
If the velocity varies parabolically, how does the acceleration vary?
- ALinearly
- BHyperbolically
- CParabolically
- DElliptically
Explanation:
Velocity varies parabolically implies that velocity is of the form at + bt2. On differentiating the velocity, we get the equation for acceleration.
Therefore, $\text{a}=\frac{\text{dv}}{\text{dt}}=\text{a}+2\text{bt},$ which is a linear equation. Hence the acceleration varies linearly.
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$(a)$ Screw moves $0.5\,mm$ on main scale in one complete rotation
$(b)$ Total divisions on circular scale $=50$
$(c)$ Main scale reading is $2.5\,mm$
$(d)$ $45^{\text {th }}$ division of circular scale is in the pitch line
$(e)$ Instrument has $0.03 \;mm$ negative error
Then the diameter of wire is $...........\,mm$

