The 2860-lb car is traveling at 31 mi/hr when the driver applies the brakes, and the car continues to move along the circular path. What is the maximum deceleration possible (a; is negative if the speed is decreasing) if the tires are limited to a total horizontal friction force of 3070 Ib? 88 ft
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- The figure shows two possible paths for negotiating an unbanked turn on a horizontal portion of a race course. Path A-A follows the centerline of the road and has a radius of curvature PA = 81 m, while path B-B uses the width of the road to good advantage in increasing the radius of curvature to PB = 189 m. If the drivers limit their speeds in their curves so that the lateral acceleration does not exceed 0.68g, determine the maximum speed for each path. 189 m Answers: (VA)max= (VB)max= i i 81 m m/s m/sA car travels around a horizontal bend of radius 110 m at a constant speed. If the coefficient of the static friction between the road and car tyres is us = 7.4, What is the magnitude of car's acceleration (m/s²) when the car is negotiating ?the bend at the maximum allowed speedAn aerobatic airplane is stressed for a maximum of 10g acceleration. During a loop, the pilot pulls the airplane around the bottom of the loop with a radius of 0.100km. What is the maximum speed permitted at the bottom of the loop?
- A crate of eggs is located in the middle of the flat bed of a pickup truck as the truck negotiates a curve in the flat road. The curve may be regarded as an arc of a circle of radius 33.8 m. If the coefficient of static friction between crate and truck is 0.610, how fast can the truck be moving without the crate sliding? Vmax= m/sA small vochito of mass 607 kg breaks down as it climbs a hill with an angle of inclination of 17° hel. coefficient of friction between the car and the surface is 0.75. What is the magnitude of its acceleration as it moves down the ramp?Problem 5: A car negotiates an unbanked 85.2 m radius curve at 19.9 m/s. Calculate the minimum coeficient of friction needed to negotiate the curve. Hg = || sin() cotan() atan() cosh() cos() asin() acotan() tanh() O Degrees tan() ♫ acos() E sinh() cotanh() Radians 7 ^^^ 4 1 1 + 0 VO BACKSPACE * ∞02 - 8 9 5 63 DEL HOME END CLEAR
- = A curve that has a radius of 95 m is banked at an angle of 0 10.0°. If a 1050 kg car navigates the curve at 70 km/h without skidding, what is the minimum coefficient of static friction Ms between the pavement and the tires? Ms =A small piece of Styrofoam packing material is dropped from a height of 2.50 m above the ground. Until it reaches terminal speed, the magnitude of its acceleration is given by a = g - Bv. After falling 0.400 m, the Styrofoam effectively reaches terminal speed, and then takes 5.10 s more to reach the ground. (a) What is the value of the constant B? s-1 (b) What is the acceleration at t = 0? m/s² (down) (c) What is the acceleration when the speed is 0.150 m/s? m/s² (down)Civil and traffic engineers want to design a banked curve on a highway. The curve will have a 1.80 km radius and the highway's speed limit will be 70.0 mph. If every car will travel at the speed limit, what is this curve's ideal banking angle to three significant figures? NB: 1609 m = 1 mile. Hint: be careful with your units. 1.94° 2.62° 4.02° 3.18° 2.95° 15.5°
- FTA FTB mA = 8.0 kg mg 10.0 kg 619 32° FTA = FTB for a pully with negligible mass as and friction. What are FTA = FTB ? Give your answer in Newtons to the correct number of significant figures. Remember: For a problem like this, an FBD is required on the midterm!To withstand "g-forces" of up to 10 g's, caused by suddenly pulling out of a steep dive, fighter jet pilots train on a "human centrifuge." 10 g's is an acceleration of 98 m/s². If the length of the centrifuge arm is 15.0 m, at what speed is the rider moving when she experiences 10 g's? Express your answer with the appropriate units.