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KE & PE PROBLEMS

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**John has an object suspended in the air**

John has an object suspended in the air. It has a mass of 50 kg and is 50 m above the ground. How much work would the object do if it was dropped? Gravity is 9.8 m/s2.

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**Mrs. Jacobs dropped an object from 10 m**

Mrs. Jacobs dropped an object from 10 m. She knows it did 50 joules of work and gravity is 9.8 m/s2. How much was its mass?

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**Thomas dropped an 20 kg object**

Thomas dropped an 20 kg object. He knows it did 120 joules of work and gravity is 9.8 m/s2. How high was the object when it was dropped?

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**What is the mass of a man running at 4**

What is the mass of a man running at 4.34 m/s if he has a kinetic energy of joules?

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**What is the speed of a 63.8 kg woman running with a kinetic energy of 1156 joules?**

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**What is the speed of a 140.1 kg woman running with a kinetic energy of 1307 joules?**

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**What is the mass of a man running at 3**

What is the mass of a man running at 3.26 m/s if he has a kinetic energy of joules

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IB Physics 11 Mr. Jean November 3 rd, 2014. The plan: Video clips of the day Work Potential energy –Gravitational potential kinetic energy.

IB Physics 11 Mr. Jean November 3 rd, 2014. The plan: Video clips of the day Work Potential energy –Gravitational potential kinetic energy.

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