Question

question 9 of 25
john pushes his brother danny on a skateboard. john applies a force of 150 n and dannys acceleration is 1.2 m/s². what is the combined mass of danny and his skateboard?
a. 58 kg
b. 45 kg
c. 125 kg
d. 75 kg

Explanation:

Step1: Recall Newton's second law

$F = ma$ (where $F$ is force, $m$ is mass, $a$ is acceleration).

Step2: Solve for mass

We need to find $m$, so we can rewrite the formula as $m=\frac{F}{a}$. Given $F = 150N$ and $a=1.2m/s^{2}$, then $m=\frac{150}{1.2}$.

Step3: Calculate the value of mass

$m=\frac{150}{1.2}=125kg$.

Answer:

C. 125 kg