Questions: 16. 그림은 단위 시간당 속도 변화량이 일주 동을 하는 자동차를 나타낸 것이다. 1 초일 때 자동차의 속력은? (1) 6 m / s (2) 8 m / s (3) 10 m / s (4) 12 m / s (5) 14 m / s

Solution Steps

• At 0 seconds, the car's speed is 0 m/s.
• At 1 second, the car's speed is 5 m/s.
• At 2 seconds, the car's speed is 15 m/s.

• The change in speed from 0 to 1 second is 5 m/s.
• The change in speed from 1 to 2 seconds is 10 m/s.
• The time interval is 1 second.
• Acceleration (a) = Change in speed / Time interval
• From 0 to 1 second: \( a = \frac{5 \, \text{m/s}}{1 \, \text{s}} = 5 \, \text{m/s}^2 \)
• From 1 to 2 seconds: \( a = \frac{10 \, \text{m/s}}{1 \, \text{s}} = 10 \, \text{m/s}^2 \)

• The speed at 1 second is given as 5 m/s.
• This matches the given information, so no further calculation is needed.

Final Answer