Final answer:
To calculate the percent speed of the toy car, measure the speed by dividing the distance by time, then compare this to the accurate speed, and convert the ratio to a percentage. The measured speed is 0.7273 m/s, and the accurate speed is 0.9 m/s, which results in a percent speed of approximately 80.81%.
Step-by-step explanation:
To calculate the percent speed of the toy car, we first need to compare the measured speed of the car to the accurate speed given by the teacher. The measured speed can be found using the formula: speed = distance / time. In this case, the distance traveled by the toy car is 1.6 meters and the time taken is 2.2 seconds, so the measured speed would be 1.6 meters / 2.2 seconds = 0.7273 m/s (rounded to four decimal places). The teacher's provided accurate speed is 0.9 m/s.
To find the percent speed, we take the ratio of the measured speed to the accurate speed and then multiply by 100 to convert it to a percentage. Thus, percent speed = (measured speed / accurate speed) × 100. Substituting the values we have, percent speed = (0.7273 m/s / 0.9 m/s) × 100 = 80.81% (rounded to two decimal places).