Question

question 7 of 25
a dog of mass 18 kg runs at a speed of 4 m/s. what is the momentum of the dog?

a. 36 kg·m/s
b. 18 kg·m/s
c. 4.5 kg·m/s
d. 72 kg·m/s

Explanation:

Step1: Recall momentum formula

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

Step2: Substitute given values

Given $m = 18$ kg and $v=4$ m/s. So $p=18\times4$.

Step3: Calculate the result

$18\times4 = 72$ kg·m/s.

Answer:

D. 72 kg·m/s