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: Identify the formula

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

Step2: Substitute the values

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

Step3: Calculate the force

$F = 12.6$ N.

for second question:

Step1: Rearrange the formula

From $F = ma$, we can solve for $m$ as $m=\frac{F}{a}$.

Step2: Substitute the values

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

Step3: Calculate the mass

$m = 0.4$ kg.

Answer:

C. 12.6