Length of each boat: 7.0 meters Time for boat to pass point A (right before last

Question

Length of each boat: 7.0 meters

Time for boat to pass point A (right before last drop): 1.9 sec

Time for boat to come down the slide (A to B): 2.8 seconds

Time for boat to pass point C: 3.5 seconds

Your Mass: 60 Kg

10. What is the velocity of the boat, in meters/second, at point A right before the last final drop?

11. What is the average velocity of the boat in meters per second as it goes down the slide?

12. What is the velocity of the boat at point B, if you assume constant acceleration? Remember the initial velocity of the boat is at point A

13. What is your momentum at point B in kg m/s?

14. What is your speed in m/s after the splash as the boat passes point C?

15. What is your momentum in kg m/s at point C?

16. What is your difference in momentum between points B and C in kg (meters/second)?

17. If the time required to go between points B and C was 1.5 seconds (duration of the final splash), calculate the force in Newtons on your body that you experienced.

18. What was the force factor that your body experienced during the splash?

http://www.straymondhighschool.org/ourpages/auto/2010/5/4/51886111/Physics6.pdfSee page three of this packet for a diagram.

Thanks so much!!

Explanation / Answer

10) 7/1.9 = 3.7 m/s 11) 37/2.8 = 13.2 m/s 12) v_avr = (v_B + vA) / 2 >>> v_B = 2 * v_avr - v_A = 2*13.214 - 3.684 = 22.7 m/s 13) 60 * 22.74 = 1360 Kg.m/s 14) p = m v = 7/3.5 = 2 m/s 15) p = m v = 60 * 2 = 120 Kg.m/s 16) p_B - p_C = 1362 - 120 = 1242 Kg.m/s 17) F = dp/dt = 1242/1.5 = 828 N 18) 1.4

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