An object of mass m has an initial velocity of u at point A, where it enters the fixed incline shown below. The kinetic friction coefficient between the object and the surface is μ 0.3. An instant after the object passes point B the normal reaction force from the supporting surface onto the object drops to one-half the value it had before reaching B. The distance d=4mm. Determine: a) the acceleration of the object just before reaching point B, b) the initial velocity u of the object at A.

An object of mass m has an initial velocity of u at point A, where it enters the fixed incline shown below. The kinetic friction coefficient between the object and the surface is μ 0.3. An instant after the object passes point B the normal reaction force from the supporting surface onto the object drops to one-half the value it had before reaching B. The distance d=4mm. Determine: a) the acceleration of the object just before reaching point B, b) the initial velocity u of the object at A.

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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Question

Hi, I have an engineering dynamics question.

An object of mass m has an initial velocity of u at point A, where it enters the fixed incline shown
below. The kinetic friction coefficient between the object and the surface is u=0.3. An instant after
the object passes point B the normal reaction force from the supporting surface onto the object
drops to one-half the value it had before reaching B. The distance d=4mm. Determine:
a) the acceleration of the object just before reaching point B,
b) the initial velocity u of the object at A.
Treat the object as a particle, neglecting its size and air resistance. Free body diagrams are
required as part of the solution.
2 m
B
/2 m
Mk=0.3
d

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