Practice question
Question
A car moves north at 12m/s while a wind blows east at 5m/s. What is the magnitude of the car’s velocity relative to the ground?
Explanation
Velocity components: vx=5m/s,vy=12m/s. As per NCERT Chapter 3, equations v=u+at, s=ut+½at², v²=u²+2as describe uniformly accelerated motion. Applying correct signs and units gives 13 m/s as the result, so option B is correct.
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