حل التدريبات العملية: الحركة التوافقية البسيطة في نابض أفقي وبندول بسيط

نحسب سعة الاهتزاز من تعبير السرعة بدلالة الموقع: 

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نُعبّر عن سعة الحركة بدلالة سرعة الجسم:

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مُعطى أنه في لحظة بداية الحركة التوافقية، عندما يكون الجسم في نقطة أصل المحور، سرعته تساوي 8 أمتار في الثانية

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لا يبدأ الجسم حركته من نقطة الطرف الموجبة، ولذلك لاستخدام دوال الحركة التوافقية البسيطة بدلالة الزمن، يجب أولًا إيجاد زاوية الطور الابتدائية.