A body starts with an initial velocity of 20 m/s and moves with a uniform acceleration, a, for 15 seconds. Which of the following equations represents the distance, S, traveled?
A
300 + 56\(\frac{a}{2}\)
B
300 + \(\frac{225a}{2}\)
C
300 + \(\frac{225}{2a}\)
D
300a + \(\frac{225}{2}\)
Verified Correct Answer: B.
Physical Principles & Numerical Solution
u = 20 ms-1, t = 15 s
\(S = ut + 1/2 at^2\)
S = 20(15) + \(\frac{1}{2}\times a \times 15^2\)
∴ S = 300 + 225\(\frac{a}{2}\)
Source: Myschool Past Questions Archive (Record #69358)