GPI_Fa07_HW_Ch_01

# GPI_Fa07_HW_Ch_01 - Chapter 1 Model Represent the car as a...

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Chapter 1 1.17. Model: Represent the car as a particle. Visualize: The car (particle) moves at a constant speed v so the distance between the dots is constant. While turning v remains constant, but the direction of v G changes. There will be a v G during the turn. Therefore, there is an acceleration during the turn. 1.22. Solve: (a) 2 2.54 cm 10 m 8 inches 8 (inch) 0.203 m 1 inch 1 cm ⎛⎞ == ⎜⎟ ⎝⎠ (b) feet 12 inch 1 m 66 feet/s 66 20.1 m/s s 1 foot 39.37 inch (c) 3 miles 1.609 km 1 hour 60 mph 60 26.8 m/s hour 1 mile 1 km 3600 s (d) 2 23 1 m 14 square inches 14 (inches) 9.03 10 square meter 39.37 inches × 1.26. Solve: (a) We need kg/m 3 . There are 100 cm in 1 m. If we multiply by 3 3 100 cm (1) 1 m = we do not change the size of the quantity, but only the number in terms of the new unit. Thus, the mass density of aluminum is 3 33 kg 100 cm kg 2.7 10 2.7 10 cm 1 m m ×= × (b) Likewise, the mass density of alcohol is 3 g 100 cm 1 kg kg 0.81 810 cm 1 m

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GPI_Fa07_HW_Ch_01 - Chapter 1 Model Represent the car as a...

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