*15-8. The automobile has a weight of 2700 lb and istraveling forward at 4 ft/s when it crashes into the wall. Ifthe impact occurs in 0.06 s, determine the average impulsiveforce acting on the car. Assume the brakes are not applied. Ifthe coefficient of kinetic friction between the wheels and thepavement is Hk = 0.3, calculate the impulsive force on thewall if the brakes were applied during the crash.The brakesare applied to all four wheels so that all the wheels slip.

Given data: Weight of an automobile, W = 2700 lb Velocity of automobile, V = 4 ft/s Time for impact,…

Answered: *15-8. The automobile has a weight of…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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The sports car, having a mass of 1600 kg is travelling horizontally along a 20° banked track which is circular and has a radius of curvature of 110 m. If the coefficient of friction between the tires and the road is u = 0.2, determine the maximum constant speed at which car can travel without sliding up the slope. Neglect the size of the car.
4. The block of 2 kg travels down the slope from rest from the position shown and strikes the spring of constant k = 2 kN/m. Determine the maximum deformation of the spring after it is struck by the block. Also determine the location of the block relative to the free end of the spring when it stops after being bounced back by the spring. The coefficient of kinetic friction between the block and surfaces is μ = 0.25. www. 2 m 2 m 4 3
2-) After releasing the system shown below from rest, determine the total displacement of the block on the inclined surface. Object on the cylinder loses contact with the cylinder once the cylinder goes down from the hole. Kinetic coefficient of friction between the block and inclined plane is 0.3. Pulley is massless. 50 kg 30° H₁=0.3 15 kg 15 kg 1.2 m
The crate, which has a mass of 245 kg is subjected to the action of the two forces. If it is originally at rest determine the distance it slides in order to attain a speed of 12 m/s. The coefficient of kinetic friction between the crate and the surface is 0.18 800 N 30° 4 1000 N
Determine the speed v which the 690-kg four-man bobsled must have in order to negotiate the turn without reliance on friction. Also find the net normal force N exerted on the bobsled by the track. 23° Answers: V= i N = i -p=58 m m/s kN
2. The 10-Ib block has a speed of 4 ft's when the force of F= (8t?) Ib is applied. Determine the velocity of the block when t= 2 s. The coefficient of kinetic friction at the surface is = 0.2. v = 4 ft/s F= (8°) lb
If the coefficient of kinetic friction between the150-lb crate and the ground is uk = 0.2, %3D determine the speed of the crate when t = 4 s. The crate starts from rest and is towed by %3D the 100-lb force. 100 lb 30°
The small 0.5-kg block slides with a small amount of friction on the circular path of radius r = 3.1 m in the vertical plane. If the speed of the block is 5.6 m/s as it passes point A and 3.9 m/s as it passes point B, determine the normal force exerted on the block by the surface at each of these two locations. Assume 8 = 39º. Answers: NA = B NB = i i A N !N

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