Question

question 4 of 10
you push a cart with mass 15 kg forward, giving it an acceleration of 3 m/s². how much force did you apply?
a. 18 n
b. 5 n
c. 0.2 n
d. 45 n

Explanation:

Step1: Identify the formula

Use Newton's second - law $F = ma$, where $F$ is force, $m$ is mass and $a$ is acceleration.

Step2: Substitute values

Given $m = 15\ kg$ and $a=3\ m/s^{2}$, then $F=15\times3$.

Step3: Calculate the force

$F = 45\ N$.

Answer:

D. 45 N