A particle has an initial velocity 3𝐒̂+ 4𝐣̂and an acceleration of 0.4𝐒̂+ 0.3𝐣̂. Its speed after 10 s is

Question : A particle has an initial velocity 3𝐒̂+ 4𝐣̂and an acceleration of 0.4𝐒̂+ 0.3𝐣̂. Its speed after 10 s is

(A) 10 unit

(B) 7 unit

(C) 7√2unit

(D) 8.5 units

Answer : option (C)

Solution :

A particle has an initial velocity 3𝐒̂+ 4𝐣̂and an acceleration of 0.4𝐒̂+ 0.3𝐣̂. Its speed after 10 s is
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