2000MechSolutions

2000MechSolutions - 2000 AP Mechanics Test Solutions 1) a)...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
2000 AP Mechanics Test “Solutions” 1) a) l ( cm) t 10 (s) T (s) T 2 (s 2 ) 12 7.62 0.762 0.581 18 8.89 0.889 0.790 21 10.09 1.01 1.02 32 12.08 1.21 1.46 b) Equation of best fit line through origin: T 2 = 0.045 l c) 2 2 g f T π ϖ = = = l 2 2 2 4 4 4 877 8.77 0.045 cm m g T slope s s = = = = = l d) exp 9.81 8.77 100% 100% 10.6% 9.81 g g Relative Error g - - = × = × = The relative error (10.4%) exceeds the tolerance (4%) so the experimental value and the accepted value are not in agreement e) 2 9.81 8.77 1.04 m Relative gravity g a downward s = - = - = 2) b) 2 2 bv mg bv ma a g m - = = - As velocity v increases, downward acceleration a decreases. c) 2 2 bv dv bv a g g m dt m = - = - d) Terminal speed is reached when the acceleration is zero and the speed does not increase further: 2 2 2 0 bv bv mg mg a g g v v m m b b = - = = = = e) Gravitational potential energy is converted into kinetic energy and dissipated energy: 2 2 1 1 2 2 2 f mg m g mgh mv Q m Q Q mgh b b = + = + = -
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3) a) 2 0 2 T mg ma T mg - = = = b) i) 3 3 3 3 3 2
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

2000MechSolutions - 2000 AP Mechanics Test Solutions 1) a)...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online