*14-20. The crash cushion for a highway barrier consistsof a nest of barrels filled with an impact-absorbing material.The barrier stopping force is measured versus the vehiclepenetration into the barrier. Determine the distance a carhaving a weight of 4000 lb will penetrate the barrier if it isoriginally traveling at 55 ft/s when it strikes the first barrel.36271810152025Vehicle penetration (ft)Barrier stopping force (kip)9,

Answered: Image /qna-images/answer/1c59c34c-0616-4b36-b8d5-26b6c5761865.jpg

Answered: *14-20. The crash cushion for a highway…

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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Answer: sA = 19.973 m
Determine the time required by a diesel-electric locomotive, which produces a constant drawbar pull of 122400 Ib, to increase the speed of a 1960-ton freight train from 16 mi/hr to 27 mi/hr up a 2.4-percent grade. Train resistance is 9.5 Ib per ton. Answer:t= i min
A car with passengers has a mass of 1200 kg and a frontal area of 1.8 m. It is traveling up a gradient of 1 in 25 at a speed of75 km/h. The rolling resistance of the car is given by R, = (0.0112 + 0.00006 V) Mg and the air resistance coefficient is 0.02688. The engine develops 50 kW corresponding to an engine speed of 4500 rpm. The rear axle ratio is 5:1 and the transmission efficiency is 96%. If the wheel radius is 340 mm, determine the 1. tractive resistance 2. tractive effort available at the wheels and 3. acceleration while moving up the gradient
Block A of 500-kg mass is subjected to a towing force F= 2000 t^2 + 3000 t N where "t" is in seconds. If the initial velocity of the block is 6 m/s, determine the velocity after 4 seconds. The block is being towed at a surface inclined at 45 degrees and the coefficient of kinetic friction between these is 0.2. Answer: 106.04 m/s Show COMPLETE STEP-BY-STEP SOLUTIONS and NECESSARY FIGURES to satisfy the answer. Thank you
A bullet B of mass mB traveling with a speed v0= 1200 m/s ricochets off a fixed steel plate A of mass mA. Let mA >> mBso that it can be assumed that mB/mA→0. If the incidence angle of the bullet is θ= 15◦ and the COR of the impact is e= 0.5, determine the rebound angle φ, as well as the bullet’s rebound speed. Use conservation lawmethods to solve the problem.
A projectile (m, = 64 g) traveling at v = 680 m/s strikes and becomes embedded in the block (m, = 47 kg), which is initially stationary. Compute the energy lost during the impact. Express your answer as an absolute value |AE| and as a percentage n of the original system energy E. Answers: ΙΔΕΙ- i n = i
Q13. As shown in the image below, the force acting on the 23-kg box is F = (C.s) N, where constant C = 2 and s is displacement in m. If the box has initial velocity of 1.2 m/s when s = 0, determine the power of force Fwhen s = 2.7 m. The ground is smooth. Please pay attention: the numbers may change since they are randomized. Your answer must include 1 place after the decimal point, and proper Sl unit. S | s Your Answer: Answer units F
I need help please
a box with a mass of 20kg pulls with constant force p=w if the box was initially at rest what is its speed after a time t=5 the coefficient of friction is mk=02
Question 9– answer all parts A heavy goods vehicle of total mass 4.8 tonnes descends a hill with a gradient of 8 degrees from the horizontal. During this motion, the vehicle experiences a rolling resistance to its motion of 880 N. Whilst travelling at a velocity of 72 km/h, its brakes are applied, and the truck is brought uniformly to rest in a distance of 140 m. During this period of constant deceleration, it may be assumed that the rolling resistance remains constant at 88ON, this being in addition to the retarding force applied by the brakes. Calculate for the vehicle whilst it is slowing down: a) The vertical height through which it descends. b) Its decrease in potential energy. c) Its initial velocity in m/s. Its decrease in kinetic energy. -------------------- ---------------- -------------- ---------
A 5.7 KN car has Cd = 0.38, Af = 2.5 m², and an available tractive effort of 1,612N. If the car is traveling at an elevation of 1500m on a paved surface at a speed of 89 kph, what is the maximum grade that this car could ascend and still maintain the speed? Answer in percentage in two decimal places.
Answers must be in S.I Units. A specific spring is attached to a 6.613 Ibs. smooth collar and the collar is released from rest at A, determine the speed of the collar when it reaches B. The spring has a stiffness k (stiffness coefficient) = 180 N/m and an unstretched length of 0.5 meters. To solve the problem, please neglect the size of the collar. 180 N/m 3m 2.5m

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