Question

If the displacement of a body moving with constant acceleration in a straight line path in the first four seconds of time is 56 m and its displacement in the fourth second of the motion is 17 m, then the average velocity of the body during sixth second of its motion is

• A. $18\,ms^{-1}$
• B. $21\,ms^{-1}$
• C. $11\,ms^{-1}$
• D. $26\,ms^{-1}$

Hint:

Displacement during nth second: \[ S_n=u+\frac{a}{2}(2n-1) \] is very useful in such problems.

Answer 1

The Correct Option is D