Question

a 70.0 kg sprinter starts a race with an acceleration of 2.04 m/s². what is the net external force (in n) on him? (enter the magnitude.)

Explanation:

Step1: Identify the formula

Use Newton's second - law $F = ma$.

Step2: Substitute values

$m = 70.0\ kg$, $a=2.04\ m/s^{2}$, so $F=(70.0\ kg)\times(2.04\ m/s^{2})$.

Step3: Calculate the force

$F = 142.8\ N$.

Answer:

$142.8$