A cyclist is travelling eastwards at a velocity of 40 ms and rain is falling vertically at a
speed of 10 ms. Find the velocity of the
rain relative to the cyclist. [41.2 m/s : 256)

0.02 m/s^2

Explanation:

change in velocity= 4.5m/s - 2.3m/s = 2.2 m/s

acceleration= change in velocity/change in time

acceleration= 2.2/120= 0.0183

= 0.02 (to 2 significant figures)

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

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