solve the las queastion and this is the link http://postimg.org/image/x8yckk9l9/

Question

solve the las queastion and this is the link

http://postimg.org/image/x8yckk9l9/

A 5 kg ball is released as shown. 6 sec later it hits the rough surface (e = .75) whenever it bounces, Would it clear the wall ? The 199th beam of radius of 8th is supported by the edge of the table and a spring that was stretched 0.75" Before being attached at B. Determine the reactions Ax and Ay immediately upon the removal of the table. What will be the omega of the beam when it attains the horizontal configuration? Knowing that the velocity of collar D is 20 1 / sec, determine omega AD omega EB VA Remember! Velocity has to have direction. How far away from the red light should the driver going at 90 mph apply his brakes so as not to ensue any instabilities to the unsecured load he is transporting?

Explanation / Answer

let v and u be the final and initial velocities of the object

let the acceleration of object be a

we know that

v = u + at

or t = (v - u/a)

where t is time

let S be the distance travelled by object therefore

v^2 - u^2 = 2aS

or S = (v^2 - u^2/2a)

let m be the mass of object

the force acting on object is

F = m x a

the work done on the object is

W = F x S

the work done is also equal to the change in kinetic energy therefore

W = (1/2)m x (v^2 - u^2)

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