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Understanding Physics: Weight, Density, and Gravity

Explore the concepts of weight, density, and gravity in physics. Learn about mass, inertia, and metric weight measurement. Understand how these factors interact and affect objects in our world.

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Understanding Physics: Weight, Density, and Gravity

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Presentation Transcript

  1. Chapter 2 Review

  2. My clicker is working • Yes • no

  3. Weight is… • How much matter is in something • A measure of the force of gravity’s pull • The same as weight • A value that does not change with location • I don’t know

  4. Density is • The volume per unit mass • The mass per unit volume • The weight of an object • How much matter is in an object • IDK

  5. Gravity is affected by two things • Mass and distance between objects • Mass and weight • Location and mass • Density and volume • IDK

  6. Metric weight is measured in • Kilograms • Grams • Centimeters cubed • Newtons • IDK

  7. The resistance of an object to change its motion is called • Inertia • Mass • Density • Gravity • IDK

  8. The equation to find metric weight is • Mass = weight x ag • N = kg/ag • Weight = mass x ag • D = m/v

  9. N = kg x ag solve for kg • kg = N x ag • kg = ag/N • kg = N/ag • IDK

  10. The value for G on Earth is • 9.81 N • 9.81 m/s • 9.81 kg • 9.81 m/s2

  11. If you have as mass of 50kg what is your weight • 490.5 kg • 490.5 N • 5.09 N • 5.09 kg • IDK

  12. If a cube has a side length of 4cm and a mass of 20 kg what is its density? • 5 kg/cm3 • .31 kg/cm3 • 80 kg/cm3 • 3.2 kg/cm3 • IDK

  13. I can change an objects density by • I can not change density • Cutting it in half • Adding more matter of the same type to it • Changing its temperature • IDK

  14. Which is more dense, a ton of ice or a small rock • There is not enough information • The ton of ice • The rock • They are equal • IDK

  15. What is the relationship between mass and inertia • More mass more inertia • Less mass more inertia • More information is needed • They are not related • IDK

  16. What has the least inertia? • A parked 865 kg car • A thrown 4 kg baseball at 92 mph • A 49 kg child on a bike riding at 2 mph • A 89 kg person running at 5 mph • IDK

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