Question

If Maggie is walking at 1.4 m/s and accelerates at 0.20 m/s^2. What is her final velocity at the end of 100.0m

Answer 1

Answer:

6.478m/s

Explanation:

There are some assumptions to be made. To answer this problem, I assume that Maggie is walking in a straight line and that she initially starts off with a velocity of 1.4m/s.

Maggie initially walks at a speed of 1.4m/s. We are also told that the acceleration is 0.2m/s^2 and that she walked a total of 100m. Therefore our parameters are:

$v_i=1.4\frac{m}{s}\\a=0.2\frac{m}{s^2}\\d=100m\\v_f=?$

Looking up kinematic equations that contains these parameters are

$v_f^2=v_i^2+2ad\\v_f^2=(1.4\frac{m}{s})^2+2*(0.2\frac{m}{s^2})(100m)\\v_f^2=41.96\frac{m^2}{s^2}\\v_f=6.478\frac{m}{s}$