Question

A graph of $v(t)$ is shown for a world-class track sprinter in a 100-m race. (See Figure 2.79). (a) What is his average velocity for the first 4 s? (b) What is his instantaneous velocity at $t = 5 \textrm{ s}$? (c) What is his average acceleration between 0 and 4 s? (d) What is his time for the race?

Question Image

a) $6 \textrm{ m/s}$

b) $12 \textrm{ m/s}$

c) $3 \textrm{ m/s}^2$

d) $10 \textrm{ s}$

Solution Video