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(11 % ) Problem. 9: A motorist in Spain is on a route that has a posted speed limit of Yn- 75 km/hr and is traveling over the speed limit by vc 22 km/hr. A van pulls out of a garage into the street in front of the motorist d 19 m in front of the motorist and stops there. The motorist immediately slams on the brakes and begins decelerating at a rate of ab 3.3 m/s225% Part a By what conversion actor do you need to multiply a speed expressed in kilometers per hour in order to obtain the value of that speed expressed in meters per second? x 20.83 X Attempts Remain - Δ 25% Part (b) Select an expression (using the variables provided) for the minimum distance, dc, the motorist would need to come to a complete stop Δ 25% Part (c) Enter an expression for the time, t, it will take the van to come to a stop after applying the brakes, in terms of the defined quantities - Δ 25% Part (d) How fast, in meters per second, is the motorist traveling when he hits the van in front of him? Grade Summary Deductions Potential 0% 100% tan() acos Submissions Attempts remaining: 10 coso π cotan asinO % per attempt) detailed view atan acotan sinh0 coshOt cotanhO Degrees Radians 0 VO Submit Hint

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Answer #1

M)etevs second km looo m 5 msec 36oo Sec kM we have multiply by 10.2471 to Convent km/hr in msec ConVer+ Pavt B v. final vedo city = should be ial velo aty22 - 6.9 mse (26.94) 2× 3.3 dc Cu c =Pavt a3.3ms time t can be Calculated by above eypvession 2

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