Question

question ①
the resultant of a 30 n force at right angles to a 40 n force is
answer
40 n
50 n
30 n
70 n
10 n
i dont know yet

Explanation:

Step1: Recall Pythagorean theorem for forces

For two perpendicular forces $F_1$ and $F_2$, the resultant force $R$ is calculated as $R = \sqrt{F_1^2 + F_2^2}$.

Step2: Substitute given force values

$F_1 = 30\ \text{N}$, $F_2 = 40\ \text{N}$
$R = \sqrt{(30)^2 + (40)^2}$

Step3: Calculate squares and sum

$30^2 = 900$, $40^2 = 1600$
$R = \sqrt{900 + 1600} = \sqrt{2500}$

Step4: Compute square root

$R = 50\ \text{N}$

Answer:

B. 50 N