Year 7 CAIE Physics Case Study Workout | 七年级CAIE物理案例分析实战演练

📚 Year 7 CAIE Physics Case Study Workout | 七年级CAIE物理案例分析实战演练

Welcome to this case study workout specifically designed for Year 7 CAIE Physics learners. Each scenario is drawn from real-world physics situations, challenging you to apply concepts such as speed, weight, density, electric circuits, energy transformations, sound, light, heat transfer, springs, and friction. For every case, you will find a problem statement followed by a step-by-step analysis in a clear bilingual format.

欢迎来到专为七年级CAIE物理设计的案例分析实战演练。每个场景都源自真实物理情境，考验你对速度、重量、密度、电路、能量转换、声音、光、热传递、弹簧和摩擦等概念的应用。每个案例均给出问题陈述，并以清晰的中英双语逐步分析。

1. Case 1: The Speeding Cyclist | 案例1：飞驰的骑行者

A cyclist travels a straight road for 150 metres in 30 seconds. Calculate her average speed. Then, determine how far she travels in 10 seconds if she maintains this speed.

一位骑行者沿直路行驶150米，用时30秒。计算她的平均速度。然后，如果保持该速度，求她在10秒内通过的距离。

Step 1: Average speed formula is speed = distance / time. Substitute: speed = 150 m / 30 s = 5 m/s.

步骤1：平均速度公式为 速度 = 距离 / 时间。代入：速度 = 150米 / 30秒 = 5米/秒。

Step 2: To find distance travelled in 10 s, use distance = speed × time. Distance = 5 m/s × 10 s = 50 m.

步骤2：求10秒内通过的距离，用 距离 = 速度 × 时间。距离 = 5米/秒 × 10秒 = 50米。

Step 3: This assumes constant speed. In practice, cyclists may change speed, but average speed simplifies motion.

步骤3：这假定速度恒定。实际骑行速度可能变化，但平均速度简化了运动分析。

Published by TutorHao | Year 7 Physics Revision Series | aleveler.com

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