Final answer:
The acceleration of a car down a ramp with a force of 4 newtons and a mass of 0.8 kg is calculated using Newton's second law of motion to be 5 meters per second squared (5 m/s²).
Step-by-step explanation:
To calculate the acceleration of a car down a ramp when a force of 4 newtons is pulling the car down and the car has a mass of 800 grams (0.8 kg), we use Newton's second law of motion, which states that force equals mass times acceleration (F = ma). Given the force (F) and the mass (m), we can solve for the acceleration (a) using the formula a = F/m.
To find the acceleration:
a = Force / Mass
a = 4 N / 0.8 kg = 5 m/s2
Therefore, the acceleration of the car is 5 meters per second squared (5 m/s2).