Final answer:
The acceleration of a toy car moving with a constant velocity of 0.8 m/s is 0. The displacement after 5 seconds is 4 meters.
Step-by-step explanation:
If a toy car is moving across the ground with a constant velocity of 0.8 m/s, then the acceleration is 0 because acceleration measures the rate of change of velocity and the velocity is constant.
To find the displacement of the car after 5 seconds, you can use the formula for displacement with constant velocity, which is:
Displacement = Velocity × time
So, the displacement after 5 seconds is:
0.8 m/s × 5 s = 4 m
Therefore, the car would have moved 4 meters after 5 seconds.