Question

modify the equation $fdelta t=delta(mv)$ to find the force of friction. express your answer to two significant figures and include the appropriate units. $f = \text{value} \text{ units}$

Explanation:

Step1: Isolate the force $F$

Given $F\Delta t=\Delta(mv)$, divide both sides by $\Delta t$. So $F = \frac{\Delta(mv)}{\Delta t}$.

Step2: Identify friction force

The force $F$ here represents the net - force. If we are considering the force of friction $f$ as the only force acting (or the net - force), then $f=\frac{\Delta(mv)}{\Delta t}$. But since no values for $\Delta(mv)$ and $\Delta t$ are given in the problem statement, we assume the general form for the answer.

Answer:

$f=\frac{\Delta(mv)}{\Delta t}$, Units: $\text{kg}\cdot\text{m/s}^2$ or $\text{N}$