An Olympic-class sprinter starts a race with an acceleration of 4.50 m/s2 . (a) What is her speed 2.40 s later? (b) Sketch a graph of her position vs. time for this period.

Solution 20PE

An Olympic-class sprinter starts a race with an acceleration of 4.50

a.)Her speed at 2.4 s later can be calculated using the equation . Now, ,. So,

= 10.8

b.) A graph of her position vs. time for this period can be plotted as shown below.

Assuming that the acceleration is constant ,the position is given...