Question

The initial velocity of a body moving along a straight line is 7 $m/s$. It has a uniform acceleration of$4m/s^{2}$. The distance covered by the body in the 5^th second of its motion is

• A. 25 m
• B. 35 m
• C. 50 m
• D. 85 m

Answer 1

Answer: (A)

25 m

Answer 2

$S_{n} = u + \frac{a}{2}\lbrack 2n - 1\rbrack$

$S_{5^{th}} = 7 + \frac{4}{2}\lbrack 2 \times 5 - 1\rbrack = 7 + 18 = 25m$.