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Unformatted text preview: Ch. 1 1,5,9,19,29,31,33 P1.1 Prepare: The cars motion is along the x-axis and it slows down after the skid begins. Solve: P1.5. Prepare: Displacement is the difference between a final position x f and an initial position x i This can be written as = = f i , x x x and we are given that x i = 23 m and that x = 45 m. Solve: - f i = x x x Since we want to know the final position we solve this for f . x = + = + - = - f i 23m ( 45m) 22m x x x Assess: A negative displacement means a movement to the left, and Keira has moved left from x = 23 m to x = u 22 m. P1.9. Prepare: We are asked to rank order three different speeds, so we simply compute each one according to Equation 1.1: = distance traveled in a given time interval speed time interval Solve: (i) Toy = 0.15m 0.060 m/s 2.5s (ii) Ball 2.3m = 4.2 m/s 0.55s (iii) Bicycle 0.60m = 8.0 m/s 0.075s (iv) Cat 8.0m = 4.0 m/s 2.0s So the order from fastest to slowest is bicycle, ball, cat, and toy....
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This note was uploaded on 09/13/2008 for the course PHY 151 taught by Professor Cu during the Spring '08 term at Simpson.
- Spring '08