Question

a 3 kg drone is accelerating at 4.2 m/s². what force is acting on the drone?
a 0.71
b 1.4
c 12.6
d 29.4
question 4
5 points
a small rocket motor produces a thrust of 6 n and upon ignition is measured to have a horizontal acceleration of 15 m/s². what is the mass of the rocket in kg?

Explanation:

Step1: Recall Newton's second - law formula

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

Step2: Substitute values for the drone problem

Given $m = 3$ kg and $a=4.2$ m/s², then $F=3\times4.2$
$F = 12.6$ N

Step3: For the rocket problem, rearrange Newton's second - law formula

$m=\frac{F}{a}$

Step4: Substitute values for the rocket problem

Given $F = 6$ N and $a = 15$ m/s², then $m=\frac{6}{15}=0.4$ kg

Answer:

Question 3: C. 12.6
Question 4: 0.4