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34. A particle has initial velocity (21 + 3j) andacceleration (0.3 +0.21). The magnitudeof velocity after 10 second will bea) 9V2 units c) 5 unitsb) 572 units d) 9 units

Answer»

Correct answer is (b)

Use v=u+atV=(2i+3j)+10(0.3i+2j)=(2+3)i+(3+2)j=5i+5jhencemagnitude will be √5^2+5^2=5√2 units option c

tha correct answer is option b



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