Question

station #4: newtons laws application (5 min)
match the law (1st, 2nd, or 3rd):
a. rocket pushes gas down, gas pushes rocket up → law ___
b. car crashes: f = ma determines injury severity → law ___
c. book on table stays at rest → law ___
calculation: if a 0.5 kg ball is kicked with 150 n, what is its acceleration?
prepare to teach the class: how all three laws connect to real scenarios.

Explanation:

Step1: Match Law A

Newton's 3rd Law: action-reaction pairs. Rocket-gas forces are mutual.

Step2: Match Law B

Newton's 2nd Law: $F=ma$ relates force, mass, acceleration.

Step3: Match Law C

Newton's 1st Law: objects at rest stay at rest (inertia).

Step4: Calculate acceleration

Use $a=\frac{F}{m}$. Substitute $F=150\,\text{N}$, $m=0.5\,\text{kg}$.
$a=\frac{150}{0.5}=300\,\text{m/s}^2$

Answer:

A. 3rd
B. 2nd
C. 1st
Acceleration: $300\,\text{m/s}^2$