Question

A 2kg toy car is rolling down a hill and reaches a speed of 3 m/s at the bottom. what is the momentum of the toy car at that speed? You must show work.

Answer 1

To find the momentum of the toy car, we can use the formula for momentum:

\[
p = m \cdot v
\]

where:
- \( p \) is the momentum,
- \( m \) is the mass of the object,
- \( v \) is the velocity of the object.

Given:
- Mass of the toy car, \( m = 2 \, \text{kg} \)
- Speed of the toy car, \( v = 3 \, \text{m/s} \)

Now we can substitute the values into the formula:

\[
p = 2 \, \text{kg} \cdot 3 \, \text{m/s}
\]

Calculating this gives:

\[
p = 6 \, \text{kg m/s}
\]

Thus, the momentum of the toy car at that speed is \( \boxed{6 \, \text{kg m/s}} \).