A body moving with a velocity of 20 m/s begins to accelerate at 3 m/s2. How far does the body move in 5 seconds?
A. 196 m
B. 137.5 m
C. 260 m
D. 162.5 m
Answer is B.
According to the equation of motion
s = vt + 1/2 at2
Where s is distance covered, v is velocity, a is acceleration and t is time taken.
So, by putting all the values, we get
s = (20)(5) + 1/2 (3)(5)2
s = 100 + 1/2 (3)(25)
s = 100 + 1/2 75
s = 100 + 37.5
s = 137.5 meters
