Final answer:
The momentum of the toy car is calculated using the formula p = mv, resulting in a momentum of 16 kg·m/s.
Step-by-step explanation:
To calculate the momentum of the toy car, we can use the formula for momentum, which is the product of mass and velocity (p = mv). First, we need to find the velocity of the car. Velocity is the displacement divided by time taken. The car travels 40 meters in 2 seconds, so its velocity (v) is 40 meters divided by 2 seconds, which equals 20 meters per second (m/s).
Now, we can calculate the momentum of the car by multiplying its mass (0.8 kg) by its velocity (20 m/s), which gives us a momentum (p) of 16 kilogram meters per second (kg·m/s). Therefore, the momentum of the toy car is 16 kg·m/s.