What is the equation to find the weight of an object?

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Presentation transcript:

What is the equation to find the weight of an object? W=mg What unit do we use to measure weight? Newtons

2. If the mass of a rock is 4.85 kg, what is its weight on the moon? W=m*g 4.85 kg X 1.6 N= 7.76N 1 kg

3. If a piece of metal has a mass of 623g what is its weight on Neptune? 6 2 3 . W=m*g 0.623 kg X 11.7 N= 7.29N 1 kg

4. The mass of a man is 15750g what is his weight on Mars? 1 5 . 7 5 0 W=m*g 15.75 kg X 3.7N= 58.28N 1 kg

5. If a book has a mass of 4.0 pounds, what is its weight on Earth? 4.0 lb X 0.454kg= 1.816kg 1 lb W=m*g 1.816 kg X 9.8N = 17.80 N 1 kg

6. The mass of a necklace is 165oz, what is its weight on Venus? 165 oz X 28.349 g= 4677.585 g 1 oz 4 6 7 7 . 5 8 5 W=m*g 4.677585 kg X 8.9 N= 41.63 N 1 kg

7. The mass of a glass of water is 256oz, what is its weight on the moon? 256 oz X 28.349 g= 7257.344g 1 oz 7 2 5 7 . 3 4 4 W=m*g 7.257344 kg X 1.6 N= 11.61 N 1 kg

8. What is the equation to find the density of an object? D=m/v What unit do we use to measure density? g/cm3 or g/ml

9. If an object has a mass of 538. 02g and displaces 16 9. If an object has a mass of 538.02g and displaces 16.5 mL of water, what is the density? 16.5mL=16.5cm3 D= m v D= 538.02g 16.5cm3 D=32.61g/cm3

10. If an object has a mass of 74. 25 g and a volume of 10 10. If an object has a mass of 74.25 g and a volume of 10.5 cm3, what is its density? D= m v D= 74.25g 10.5cm3 D=7.07g/cm3

11. A sample of metal has a mass of 450. 6g and a volume of 120. 4 cm3 11. A sample of metal has a mass of 450.6g and a volume of 120.4 cm3. What is its density? D= m v D= 450.6g 120.4cm3 D=3.74g/cm3

12. A block of an unknown metal has a mass of 7621g 12. A block of an unknown metal has a mass of 7621g. It has a length of 3cm, a width of 15cm, and a height of 12cm. What is the density of the metal? v= l*w*h v=3cm*15cm*12cm v=540cm3 D= m v D= 7621g 540cm3 D= 14.11g/cm3

13. If an object has a volume of 25cm3 mass of 525g, what is its density? D= m v D= 525g 25cm3 D= 21g/cm3

14. What is the density of an object with a volume of 647cm3 and a mass of 850kg? D= m v D= 850g 647cm3 D= 1.31g/cm3