Question

1. an object at rest will __________ at rest until a force acts on it.

always
never
sometimes
occasionally

1. calculate

what is the force required to move an object with 100kg of mass at 2 m/s²?
100 n
2000 n
50 n
200 n

1. an scientific __________ is an observation of nature to prove it to you that it exists (like gravity)

hypothesis
guess

Explanation:

1.

According to Newton's first - law of motion, an object at rest will stay at rest until a force acts on it. This is an absolute principle in physics, so it will always remain at rest until a force is applied.

Step1: Recall Newton's second - law formula

The formula for Newton's second law is $F = ma$, where $F$ is force, $m$ is mass, and $a$ is acceleration.

Step2: Substitute given values

Given $m = 100\ kg$ and $a=2\ m/s^{2}$. Substitute into the formula: $F=100\times2$.

Step3: Calculate the force

$F = 200\ N$.

Answer:

A. always

6.