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**Newton’s Universal Law of Gravitation – Practice Problems**

IB Physics Power Points Topic 6 SL Fields and Forces Newton’s Universal Law of Gravitation – Practice Problems

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1. Draw free body diagrams (including annotations and calculated values) representing the following situations (consider g = 10 ms-2) A 50 kg student in an elevator at rest A 50 kg student in an elevator moving downwards at 2 ms-1. A 50 kg student in an elevator moving upwards at 5 ms-1. A 50 kg student in an elevator accelerating upwards at 1 ms-2. A 50 kg student in an elevator accelerating downwards at 3 ms-2 A 50 kg student in an elevator falling freely

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1. Draw free body diagrams (including annotations and calculated values) representing the following situations (consider g = 10 ms-2) A 50 kg student in an elevator at rest

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1. Draw free body diagrams (including annotations and calculated values) representing the following situations (consider g = 10 ms-2) A 50 kg student in an elevator at rest

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1. Draw free body diagrams (including annotations and calculated values) representing the following situations (consider g = 10 ms-2) A 50 kg student in an elevator at rest weight = 50 kg x 10 ms-2 = 500 N mg 500 N

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1. Draw free body diagrams (including annotations and calculated values) representing the following situations (consider g = 10 ms-2) A 50 kg student in an elevator at rest Fg 500 N

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1. Draw free body diagrams (including annotations and calculated values) representing the following situations (consider g = 10 ms-2) A 50 kg student in an elevator at rest W 500 N

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1. Draw free body diagrams (including annotations and calculated values) representing the following situations (consider g = 10 ms-2) A 50 kg student in an elevator at rest FN 500 N mg 500 N

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1. Draw free body diagrams (including annotations and calculated values) representing the following situations (consider g = 10 ms-2) A 50 kg student in an elevator at rest A 50 kg student in an elevator moving downwards at 2 ms-1. A 50 kg student in an elevator moving upwards at 5 ms-1.

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1. Draw free body diagrams (including annotations and calculated values) representing the following situations (consider g = 10 ms-2) A 50 kg student in an elevator at rest A 50 kg student in an elevator moving downwards at 2 ms-1. A 50 kg student in an elevator moving upwards at 5 ms-1. FN 500 N mg 500 N

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1. Draw free body diagrams (including annotations and calculated values) representing the following situations (consider g = 10 ms-2) A 50 kg student in an elevator at rest A 50 kg student in an elevator moving downwards at 2 ms-1. A 50 kg student in an elevator moving upwards at 5 ms-1. A 50 kg student in an elevator accelerating upwards at 1 ms-2. FN 500 N mg 500 N

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1. Draw free body diagrams (including annotations and calculated values) representing the following situations (consider g = 10 ms-2) A 50 kg student in an elevator at rest A 50 kg student in an elevator moving downwards at 2 ms-1. A 50 kg student in an elevator moving upwards at 5 ms-1. A 50 kg student in an elevator accelerating upwards at 1 ms-2. FN ? mg 500 N

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1. Draw free body diagrams (including annotations and calculated values) representing the following situations (consider g = 10 ms-2) A 50 kg student in an elevator at rest A 50 kg student in an elevator moving downwards at 2 ms-1. A 50 kg student in an elevator moving upwards at 5 ms-1. A 50 kg student in an elevator accelerating upwards at 1 ms-2. 500 N mg FN ? Fnet ma ma = 50 x 1 = 50 N

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1. Draw free body diagrams (including annotations and calculated values) representing the following situations (consider g = 10 ms-2) A 50 kg student in an elevator at rest A 50 kg student in an elevator moving downwards at 2 ms-1. A 50 kg student in an elevator moving upwards at 5 ms-1. A 50 kg student in an elevator accelerating upwards at 1 ms-2. FN 550 N mg 500 N

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1. Draw free body diagrams (including annotations and calculated values) representing the following situations (consider g = 10 ms-2) A 50 kg student in an elevator at rest A 50 kg student in an elevator moving downwards at 2 ms-1. A 50 kg student in an elevator moving upwards at 5 ms-1. A 50 kg student in an elevator accelerating upwards at 1 ms-2. A 50 kg student in an elevator accelerating downwards at 3 ms-2 FN 350 N mg 500 N

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1. Draw free body diagrams (including annotations and calculated values) representing the following situations (consider g = 10 ms-2) A 50 kg student in an elevator at rest A 50 kg student in an elevator moving downwards at 2 ms-1. A 50 kg student in an elevator moving upwards at 5 ms-1. A 50 kg student in an elevator accelerating upwards at 1 ms-2. A 50 kg student in an elevator accelerating downwards at 3 ms-2 A 50 kg student in an elevator falling freely mg 500 N

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2. Which of the following graphs shows how the gravitational force varies with the distance of separation between two objects?

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**What is the mass of this satellite? 23 kg 650 kg 910 kg 1 200 kg**

3. A satellite experiences a gravitational force of 228 N at an altitude of 4.0 × 107 m above Earth. What is the mass of this satellite? 23 kg 650 kg 910 kg 1 200 kg

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4. A rock drops from a very high altitude towards the surface of the moon. Which of the following is correct about the changes that occur in the rock’s mass and weight?

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