KinematicsHard

Question

A particle moving along a straight line with uniform acceleration has velocities 7m /s at A and 17 m/s at C. B is the mid-point of AC. Then : -

Options

A.The velocity at B is 12 m/s
B.The average velocity between A and B is 10 m/s
C.The ratio of time to go from A to B to that from B to C is 3 : 2
D.The average velocity between B and C is 15 m /s

Solution



Motion A to C ⇒ 172 = 72 + 2as

Motion A to B ⇒ vB2 = 72 + 2a =
(A) vB = = 13 m/s
(B) < vAB > = = 10 m/s
(C) t1 = , t2 =
(D) < vBC > = = 15 m/s

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