You are standing in Woolworths at the fruit and vegetable section. In tearing a plastic bag from a massive perforated roll, why is a sharp jerk/pull more effective than a slow pull? Newton 2: 52. Alexis, who has a mass of 100 kg, is skateboarding at 9.0 m/s (Vi) when he smacks into a brick wall and comes to a dead stop (Vf=0m/s) in 0.2 s. a. Show that his deceleration is 45 m/s2.

College Physics
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ISBN:9781305952300
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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Newton 1:

46. You are standing in Woolworths at the fruit and vegetable section. In tearing a plastic bag from a massive perforated roll, why is a sharp jerk/pull more effective than a slow pull?

Newton 2:

52. Alexis, who has a mass of 100 kg, is skateboarding at 9.0 m/s (Vi) when he smacks into a brick wall and comes to a dead stop (Vf=0m/s) in 0.2 s.

a. Show that his deceleration is 45 m/s2.

b. Show that the force of impact is 4500 N. (Ouch!)

Newton 3:

51. a) If a Mercedes truck and Honda Civic have a head-on collision, upon which vehicle is the impact force greater? b) Which vehicle experiences the greater deceleration? Explain your answers!

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