Homework3_solutions

Homework3_solutions - Homework3Solutions Chapter3...

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Homework 3 Solutions Chapter 3 Review Questions 1. Q5: 15km 0.5hrs. = 30km/h 2. Q6: (25km/h)(0.5hrs.) = 12.5km 3. Q7: Velocity has direction, speed only has magnitude 4. Q8: Yes, but the opposite is NOT true 5. Q9: Constant speed, but not constant velocity. The direction is changing and therefore centripetal acceleration is present. 6. Q11: Poorly written question (assume constant acceleration). (100km/h 0km/h) (1h 360) = 36000km/h 2 or (0.0278km/s 0km/s) ൊ 10s ൌ 0.00278km/s 7. Q12: ሺ100km/h – 100km/hሻ ൊ (1h 360) = 0km/h 2 8. Q13: Accelerating, no 9. Q14: Linear motion 10. Q15: The change in speed per given account of time was the same, therefore the acceleration due to gravity is constant 11. Q16: It is equal to the acceleration times time (v = at). 12. Q17: Velocity was greater with a steeper incline. Therefore, the acceleration due to gravity acts in the vertical direction. 13. Q19: ~10.0 m/s 14. Q20: (10.0m/s 2 )(5s) = 50m/s, (10.0m/s 2 )(6s) = 60m/s 15. Q22: 10m/s 16. Q24: d = ½ gt 2 = (0.5)(10.0m/s 2 )(1.0s 2 ) = 5.0m, d = ½ gt 2 = (0.5)(10.0m/s 2 )(16.0s 2 ) = 80m Plug and Chug 17. Q2: S ave. = 4m 2s = 2 m/s 18. Q4: S ave. = 24m 0.5s = 48 m/s 19.
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Homework3_solutions - Homework3Solutions Chapter3...

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