Changes

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|style="width: 50%;|Image  Image Image Image  (Step 1)

|style="width: 50%;| {{ext-img|450px|https://upload.wikimedia.org/wikipedia/commons/1/15/PhET_1_pendulum.png}}

|style="width: 50%;|Image  Image Image Image  (Step 2)

|style="width: 50%;|{{ext-img|450px|https://upload.wikimedia.org/wikipedia/commons/d/df/PhET_2_pendulum.png}}

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|style="width: 50%;|Step 1 - 1. Notice where the pendulum is – is it higher, lower or at the same level as the central position?

|style="width: 50%;|Step 1 - 1. Notice where the pendulum is – is it higher, lower or at the same level as the central position?