Question

4. A racer accelerates from rest at a constant rate of 2 m/s2. (a) How fast will the racer be going at the end of 6.0 s? (b) How far has the racer traveled during this time?

(Answer: a. 12 m/s & b. 36 m)

Answer 1

(a)

$$v=v_0+at\\ =0+2*6=12\:\rm m/s$$

(b)

$$d=v_0t+at^2/2\\ =0*6+2*6^2/2=36\:\rm m$$