I Review Car B is traveling a distance d ahead of car A. Both cars are traveling at 60 ft/s when the driver of B suddenly applies the brakes, causing his car to decelerate at 12 ft/s², It takes the driver of car A 0.75 s to react (this is the normal reaction time for drivers). When he applies his brakes, he decelerates at 20 ft/s². (Figure 1) Part A Determine the minimum distance d between the cars so as to avoid a collision, Express your answer to three significant figures and include the appropriate units. • View Available Hint(s) d = 8.44 ft Submit Previous Answers Figure < 1 of 1> v Correct Here we learn how to find the minimum distance between the cars needed to avoid a collision in a situation when the front one suddenly starts to brake and the back one starts to brake more intensely after the reaction time passes. Provide Feedback Next >

Motor WORM Cears 2 Fact 4 6 7 (Figure 1) D gear 3, 4, 5, 6, 7 are Spor Gear 1) Draw Free body diagram for (figune 1). draw FBD for gear 2, 3, 4, 5, 6, 7. Should include Force [Fr, Ft), Torque (T] (and speed roration (n) [quess or make Ass Compling] ASS 2) Estimate the torque required to spin (Just the equation No calculation (Example: T = F₂₂ cos(p) ₂)

Now consider the figure shown below. N CG -A tip In the above figure the block is just on the verge of tipping: W and N act through point A and thus exert zero torque about point A. The incline angle, Otip, is the incline angle beyond which the block will tip, since increasing the angle beyond Otip will move the CG beyond where there is a point of support below it, as in the previous figure. It is not difficult to show, using some geometry and trigonometry, that Otip is given by Orip = tan' (w / h) (1) Equation (1) agrees with our intuition: If the block is short and wide (h small, w large) the block will be more difficult to tip (Otip is large) and if the block is tall and narrow (h large, w small) the block will be easier to tip (0tip is small). It is now not difficult to see why the automotive industry defines a safety factor describing how easily a vehicle will rollover as (roughly) vehicle width / vehicle height. The larger this safety factor is, the more resistant the vehicle is…

Motor WORM (ears 2 Fact 4 6 7 (Figure 1) D gear 3, 4, 5, 6, 7 are Spor Gear 1) Draw Free body diagram for (figune 1), draw FBD for gear 2, 3, 4, 5, 6, 7. Should include Force [Fr, Ft), Torque (T] (and speed roration (n) [quess or make ASS compling] 2) Estimate the torque required to spin (Just the equation No calculation ( Example: T = F₁₂ cos(p) ₂)