a boy and his skateboard have a combined mass of 65 kg. what is the speed of the boy and skateboard if they…

a boy and his skateboard have a combined mass of 65 kg. what is the speed of the boy and skateboard if they have a momentum of 275 kg·m/s?\n0 m/s\n0.24 m/s\n4.2 m/s\n8.5 m/s

a boy and his skateboard have a combined mass of 65 kg. what is the speed of the boy and skateboard if they have a momentum of 275 kg·m/s?\n0 m/s\n0.24 m/s\n4.2 m/s\n8.5 m/s

Answer

Answer:

C. 4.2 m/s

Explanation:

Step1: Recall momentum formula

$p = mv$ (where $p$ is momentum, $m$ is mass, $v$ is velocity)

Step2: Rearrange formula for velocity

$v=\frac{p}{m}$

Step3: Substitute given values

$v=\frac{275\ kg\cdot\frac{m}{s}}{65\ kg}\approx 4.2\ m/s$