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Gravity changes the direction of orbital motion - Online practice 1

Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.

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View a simplified circular orbit flat on the page with Earth at its centre. A satellite is at the top of a circular orbit and moves to the right. Ignore resistance and other bodies. Gravity acts towards Earth; instantaneous motion is tangent to the circular path. 'Top' and 'right' refer to this drawing, not absolute directions in space.

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