3/195 The 450-kg ram of a pile driver falls 1.4 m from restand strikes the top of a 240-kg pile embedded 0.9 min the ground. Upon impact the ram is seen to movewith the pile with no noticeable rebound. Determinethe velocity v of the pile and ram immediately afterimpact. Can you justify using the principle of con-servation of momentum even though the weightsact during the impact?Ans. v = 3.42 m/s1.4 m0.9 mProblem 3/195

Answered: Image /qna-images/answer/787a09ab-2839-4d82-b382-775aa0c5fe81.jpg

3/195 The 450-kg ram of a pile driver falls 1.4 m from rest and strikes the top of a 240-kg pile embedded 0.9 m in the ground. Upon impact the ram is seen to move with the pile with no noticeable rebound. Determine the velocity u of the pile and ram immediately after impact. Can you justify using the principle of con- servation of momentum even though the weights act during the impact? Ans. v = 3.42 m/s 1.4 m 0.9 m Problem 3/195

3/195 The 450-kg ram of a pile driver falls 1.4 m from rest and strikes the top of a 240-kg pile embedded 0.9 m in the ground. Upon impact the ram is seen to move with the pile with no noticeable rebound. Determine the velocity u of the pile and ram immediately after impact. Can you justify using the principle of con- servation of momentum even though the weights act during the impact? Ans. v = 3.42 m/s 1.4 m 0.9 m Problem 3/195

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

See similar textbooks

Similar questions

A 3 kg slider is released from rest at point A and slides with negligible friction' in a vertical plane along the circular rod. The attached spring has a stiffness of 350 N/m and has an unstretched length of 0.75 m. a) Which of the following gives the gravitational potential energy if the slider passes position B. b) Which of the following gives the elastic potential energy if the slider passes position B. c) Which of the following gives the velocity of slider as it passes position B
Block A has a mass of 2 kg and slides into an open ended box B with a velocity of 2 m/s. If the boxB has a mass of 3 kg and rests on top of a plate P that has a mass of 3 kg, determine the distancethe plate moves after it stops sliding on the floor. Also, how long is it after impact before allmotion ceases? The coefficient of kinetic friction between the box and the plate is μk=0.2, andbetween the plate and the floor μ'k=0.2. Also, the coefficient of static friction between the plateand the floor is μ's = 0.5
Vo = 2 kg object with a speed of 2.5 m / s B, standing still and vertical from Oit hits the 1.0 kg Atom, which dangles as. Between the object and the horizontal surfacethe coefficient of friction is 0.6. The return coefficient (e) is 0.8. From collisionthen (a) the maximum height h that the Atope reaches (b) X that the body foldsfind his distance.
The 0.75-kg bob of a pendulum is fired from rest at position A by a spring which has a stiffness k= 6 kN/m and is compressed 125 mm. Determine the speed of the bob and the tension in thecord when the bob is at positions B and C. Point B is located on the path where the radius ofcurvature is still 0.6 m, i.e., just before the cord becomes horizontal
The soccer ball shown weighs 1 lb and has a velocity of 20 fps at 40o to the horizontal prior to striking the soccer player’s head. After the soccer player heads the ball, it has a velocity of 30 fps at 20o to the horizontal. If the duration of the impact is 0.15 sec, determinea. Express the initial and final velocities of the ball in Cartesian vector formb. Magnitude and direction of the average force exerted on the soccer ball by the player’s head in Cartesianvector form.
Block A has a mass of 2 kg and slides into an OPEN-ENDED box B with a velocity of 2 m/s. If the boxB has a mass of 3 kg and rests on top of a plate P that has a mass of 3 kg, determine the distancethe plate moves after it stops sliding on the floor. Also how long in seconds is it after impact before allmotion ceases? The coefficient of kinetic friction between the box and the plate is μk=0.2, andbetween the plate and the floor μ'k=0.2. Also, the coefficient of static friction between the plateand the floor is μ's = 0.5
The 600-kg bar B, originally at rest, is towed over a series of small rollers. The motor M is drawing in the cable at a rate of v = (0.3 t2) m/s, where t is in seconds. Determine the force in the cable when t = 2 s
The simple pendulum A of mass ma = 3.9 kg and length I = 1.51 m is suspended from the trolley B of mass me = 7.9 kg. If the system isreleased from rest at 0 = 0, determine the velocity g (positive if to the right, negative if to the left) of the trolley when 0 = 90° Friction is negligible.
An engineer is studying the impacts of frontal car collisions on the occupants.If a 1900-lb car with velocity vA = 30 mph collides head on with a 2800-lb car with velocity vB =20 mph, the coefficient of restitution of the impact is e = 0.15, and the duration of the collision is0.22 seconds, then determine the magnitude of the average acceleration to which the occupants ofeach car are subjected. Assume car A and car B are on a flat surface, with car A traveling to theright and car B traveling to the left. answer should be in ft/s^2
An engineer is studying the impacts of frontal car collisions on the occupants.If a 1900-lb car with velocity vA = 30 mph collides head on with a 2800-lb car with velocity vb =20 mph, the coefficient of restitution of the impact is e = 0.15, and the duration of the collision is0.22 seconds, then determine the magnitude of the average acceleration to which the occupants ofeach car are subjected. Assume car A and car B are on a flat surface, with car A traveling to theright and car B traveling to the left
A wagon weighing 500 kN starts from rest, runs 30 meter down one percent grade and strikes the bumper post. If the rolling resistance of the track is 5 N/kN, find the velocity of the wagon when it strikes the post. If the bumper spring which compresses 1 mm for every 15 kN determine, by how much this spring will be compressed.
Considering a glancing collision between a cue ball of mass m moving at initial velocity u and a target ball of the same mass initially at rest. This results in a two-dimensional collision with the cue ball's final velocity v making an angle θ with the target ball's final velocity w. Show explicitly that the collision is elastic if and only if θ = π/2 = 90°.