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CH 2 Questions

# A the average velocity is 1 zero because the

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Unformatted text preview: 6 m/s ⎜ྎ ⎟ྏ 9.0 s ⎝ྎ 1 yd ⎠ྏ ⎜ྎ 3.281 ft ⎟ྏ ⎝ྎ ⎠ྏ 3. t = d/vav, where vav = t = (100 m)/(10.16 m/s) = 9.8 s 5. 1 cc = 1 mL. This is analogous to average speed. d 500 mL = 4.0 mL/min = 125 min . s Δt = 7. The time going is tgoing = d/v1 = (300 km)/(75 km/h) = 4.00 h The time returning is treturn = d/v2 = (300 km)/(85 km/h) = 3.53 h The average speed is vav = 2d/ttotal = (600 km)/(4.00 h + 3.53 h + 0.50 h) = 75 km/h 10. The average velocity is zero because the net displacement is zero. (a) The average velocity is (1) zero , because the displacement is zero for a complete lap. d 2π r 2π (500 m) (b) s = = = = 63 m/s . 50 s Δt Δt 12. (a) s = d 2(7.1 m) = 2.4 s = 5.9 m/s . Δt (b) Average velocity is...
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