Question

question 1 (2 points)
(02.07 lc)
what net force is necessary to give a 5.0 kg mass that is initially at rest an acceleration of 11 m/s²?
a 0.45 n
b 2.2 n
c 55 n
d 16 n

question 2 (2 points)
(02.07 lc)
a net force of 50.0 n accelerates a 15.0 kg mass. what is the resulting acceleration?
a 0.300 m/s²
b 3.33 m/s²
c 45.0 m/s²
d 750 m/s²

Explanation:

Step1: Recall Newton's second - law

$F = ma$, where $F$ is the net force, $m$ is the mass and $a$ is the acceleration.

Step2: Solve Question 1

Given $m = 5.0\ kg$ and $a=11\ m/s^{2}$. Substitute into the formula: $F=ma = 5.0\times11=55\ N$.

Step3: Solve Question 2

Given $F = 50.0\ N$ and $m = 15.0\ kg$. Rearrange the formula $F = ma$ to $a=\frac{F}{m}$. Then $a=\frac{50.0}{15.0}\approx3.33\ m/s^{2}$.

Answer:

Question 1: C. 55 N
Question 2: B. 3.33 m/s²