Question

A bus accelerates at -0.5 m/s2 for 12.5 seconds. If the bus had an initial speed of 31 m/s, what is its new speed?

A. 37.25 m/s
B. 6.25 m/s
C. 24.75 m/s
D. 12.25 m/s

Answer 1

Given
a = -0.5 m/s^2
t = 12.5 seconds
u = 31 m/s
v = ut + 1/2 at^2
v =31 * 12.5 + 1/2 * (-0.5) * (12.5)^2
v = 348.43 m/s
Weird! , Are u sure ur options are correct?

Answer 2

or u have mistyped something in question?

Answer 3

oh nevermind

Answer 4

hahah wat A Huge Mistake , BRAINDEAD

Answer 5

v = u + at

Answer 6

so v = 31 * 12.5 + (-0.5) * 12.5 = 24.75 m/s