Question

find the momentum for a 1.8 - kg brick parachuting straight downward at a constant speed of 7.8 m/s. express your answer to two significant figures and include the appropriate units. p = value units

Explanation:

Step1: Recall momentum formula

The formula for momentum is $p = mv$, where $m$ is mass and $v$ is velocity.

Step2: Identify values

Given $m = 1.8\ kg$ and $v=7.8\ m/s$.

Step3: Calculate momentum

$p=1.8\times7.8 = 14.04\ kg\cdot m/s$.

Step4: Round to two significant figures

Rounding $14.04$ to two - significant figures gives $14\ kg\cdot m/s$.

Answer:

$14\ kg\cdot m/s$