a = v2 – v1 t a = 8 m/s s a = 8 m/s2 a = 36 m/s – 4 m/s 4 s #6 d

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Presentation transcript:

a = v2 – v1 t a = 8 m/s s a = 8 m/s2 a = 36 m/s – 4 m/s 4 s #6 d V1 = 4 m/s V2 = 36 m/s a = ? t = 4 s a = v2 – v1 t a = 36 m/s – 4 m/s 4 s a = 8 m/s s a = 8 m/s2

a = v2 – v1 t a = 3 m/s s a = 3 m/s2 a = 4.5 m/s – (-3 m/s) 2.5 s #8 d V1 = -3 m/s V2 = +4.5 m/s a = ? t = 2.5 s a = v2 – v1 t a = 4.5 m/s – (-3 m/s) 2.5 s a = 3 m/s s a = 3 m/s2

a = v2 – v1 t a = -8.33 m/s2 a = 0 m/s – 25 m/s 3 s #9 d V1 = 0 m/s t = 3 s a = v2 – v1 t a = 0 m/s – 25 m/s 3 s Increased Stopping time results in smaller acceleration a = -8.33 m/s2

a = v2 – v1 t v2 = 1 m/s v2 = v1 + at b) v2 = -1 m/s #18 d V1 = 2 m/s V2 = ? a = -0.5 m/s2 t = 2 s a = v2 – v1 t v2 = v1 + at v2 = 2 m/s + (-0.5 m/s2)(2s) b) v2 = 2 m/s + (-0.5 m/s2)(6s) v2 = 1 m/s b) v2 = -1 m/s

a = v2 – v1 t t = v2 – v1 a t = 3m/s – 22m/s -2.1 m/s2 t = 9.05 s #21 d V1 = 22 m/s V2 = 3 m/s a = -2.1 m/s2 t = ? a = v2 – v1 t t = v2 – v1 a t = 3m/s – 22m/s -2.1 m/s2 t = 9.05 s

d = v1t + ½ at2 d = 0 + ½ (3 m/s2)(30s)2 d = 1,350 m #39 d = ? V1 = 0 m/s V2 = a = 3 m/s2 t = 30 s d = v1t + ½ at2 d = 0 + ½ (3 m/s2)(30s)2 d = 1,350 m

d = v1t + ½ at2 v2 = v1 + at d = 0 + ½ (3 m/s2)(30s)2 d = 1,350 m #39 d = ? V1 = 0 m/s V2 = ? a = 3 m/s2 t = 30 s d = v1t + ½ at2 d = 0 + ½ (3 m/s2)(30s)2 d = 1,350 m v2 = v1 + at v2 = 0 + (3 m/s2)(30s) v2 = 90 m/s

d = v1t + ½ at2 d = (12m/s)(6s) + ½ (-1.6 m/s2)(6s)2 = 72m – 28.8m #89 d = ? V1 = 12 m/s V2 = a = -1.6 m/s2 t = 6 s t = 9 s d = v1t + ½ at2 d = (12m/s)(6s) + ½ (-1.6 m/s2)(6s)2 = 72m – 28.8m d = 43.2 m (@ 6s) d = (12m/s)(9s) + ½ (-1.6 m/s2)(9s)2 d = 43.2 m (@ 9s)

v2 = v1 + at v2 = -28 m/s How about at t = 25s? #89 – Follow-Up: Determine VELOCITY at every second for 12 full seconds. a = -1.6m/s/s v2 = v1 + at How about at t = 25s? -0.8m/s -2.4m/s v2 = -28 m/s -4m/s 0.8m/s -5.6m/s 2.4m/s -7.2m/s 4m/s -8.8m/s 5.6m/s -10.4m/s 7.2m/s -12m/s 8.8m/s 10.4m/s @t0, v = 12m/s

v22 = v12 + 2ad v22 = 0 + 2(49m/s2)(325m) v22 = 31,850 m2/s2 #88 d = 325 m V1 = 0 m/s V2 = ? a = 49 m/s2 v22 = v12 + 2ad v22 = 0 + 2(49m/s2)(325m) v22 = 31,850 m2/s2 v2 = 178.5 m/s

#92 d = ? V1 = 66 m/s V2 = 88 m/s a = t = 12s