A particle is moving with uniform acceleration along a straight line. The average velocity of the particle from 𝑃 to 𝑄 is 8ms−1 and that from 𝑄 to 𝑆 is 12ms −1 . If 𝑄𝑆 − 𝑃𝑄, then the average velocity from 𝑃 to 𝑆 is

Question : The average velocity of the particle from 𝑃 to 𝑄 is 8ms−1 and that from 𝑄 to 𝑆 is 12ms −1 . If 𝑄𝑆 − 𝑃𝑄, then the average velocity from 𝑃 to 𝑆 is

(A) 9.6ms^{-1}

(B) 12.87ms^{-1}

(C) 64ms^{-1}

(D) 327ms^{-1}

Answer : option (A)

Solution :

The average velocity of the particle from 𝑃 to 𝑄 is 8ms−1 and that from 𝑄 to 𝑆 is 12ms −1 . If 𝑄𝑆 − 𝑃𝑄, then the average velocity from 𝑃 to 𝑆 is
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