Your brother's mass is 40.0 kg, and he has a 1.30 kg skateboard. What is the combined momentum of your brother and his skateboard if they are going 8.50 m/s?

351.05 kg * m/s

Explanation:

Combined momentum is denoted with this formula:

In other words, the combined momentum of two masses is the sum of their masses multiplied by their velocity.

Let m₁v₁ represent the brother's mass and velocity, and let m₂v₂ represent the skateboard's velocity.

List out the known variables:

Substitute the known values into the equation.

The combined momentum of the brother and his skateboard is 351.05 kg * m/s.

need to see circuit to get time constant