Question

1. what is the formula for calculating acceleration?
2. a student pushes a 60 kg object across a smooth surface with a force of 30 n. what is the acceleration of the object?
3. how many hydrogen atoms are represented in the chemical formula 4h₂o?

Explanation:

Step1: Recall acceleration formula

Acceleration formula is $a=\frac{F}{m}$, where $a$ is acceleration, $F$ is force and $m$ is mass.

Step2: Solve for question 9

Given $F = 30N$ and $m=60kg$. Substitute into formula: $a=\frac{30}{60}=0.5m/s^{2}$.

Step3: Solve for question 10

In the chemical formula $4H_2O$, each $H_2O$ has 2 hydrogen atoms. So for 4 molecules of $H_2O$, the number of hydrogen atoms is $4\times2 = 8$.

Answer:

1. $a=\frac{F}{m}$
2. $0.5m/s^{2}$
3. 8