ASSIGNMENT COVER SHEET

Manual submission

UNIT

CODE: ENS21134 – ENS5125

TITLE: ENGINEERING DYNAMICS

STUDENT NAME (print clearly)

SURNAME/FAMILY NAME FIRST NAME

STUDENT ID. NO.

LECTURER NAME (print clearly)

DUE DATE

16.9.2013 @

5pm

TOPIC OF ASSIGNMENT

A1- KINEMATICS AND KINETICS OF PARTICLES

GROUP/TUTORIAL (if applicable)

COURSE

CAMPUS

JO

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SIGNATURE DATE

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AGREEMENT DATE

PROCEDURES AND PENALTIES ON LATE ASSIGNMENTS

Refer to the University Admission, Enrolment and Academic Progress Rule 24 and the ECU Assessment Policy

• A student who wishes to defer the submission of an assignment must apply to the lecturer in charge of the relevant unit or course for an extension of the time within which to submit the assignment.

• Where an extension is sought for the submission of an assignment the application must : o be in writing - preferably before the due date; and o set out the grounds on which deferral is sought. (see ECU Assessment Policy) o http://intranet.ecu.edu.au/__data/assets/pdf_file/0009/20025/assign_ext.pdf

• Assignments submitted after the normal or extended date without approval shall incur a penalty of loss of marks. (see 39.5)

ACADEMIC MISCONDUCT Rules (Students)

• All forms of cheating, plagiarism or collusion are regarded seriously and could result in penalties including loss of marks, exclusion from the unit or cancellation of enrolment.

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ASSIGNMENT RECEIPT To be completed by the student if a receipt is required (not normally given)

UNIT

STUDENT NAME

STUDENT ID. NO.

LECTURER NAME

RECEIVED BY

TOPIC OF ASSIGNMENT

DATE RECEIVED

Problem 1:

The paint – spraying robot is programmed to paint a production line of curved surface A. the length of

the telescoping arm is controlled according to b = 0.3 sin( πt/2), where b is in meters and t is in

seconds. Simultaneously, the arm is programmed to rotate according to θ = π/4 + (π/8) sin (πt/2) radius.

Calculate the magnitude v of the velocity of the nozzle N and the magnitude a of the acceleration of N

for t = 1 s and for t = 2 s.

Problem 2:

Cylinder A has a constant downward speed of 1 m/s. compute the velocity of cylinder B for (a) θ = 45o,

(b) θ = 30o , and (c) θ = 15

o. The spring is in tension throughout the motion range of interest, and the

pulleys are connected by the cable of fixed length.

Problem 3: Packages having a mass of 2 kg are delivered from a conveyor to a smooth circular ramp with a velocity of v0 =

1 m/s as shown in the figure. If the radius of the ramp is 0.5 m, determine the angle θ = θmax at which each

package begins to leave the surface.

Problem 4:

An 800-kg rigid pile P shown in Fig. is driven into the ground using a 300-kg hammer H. The hammer falls

from rest at a height y0 = 0.5 m and strikes the top of the pile. Determine the impulse which the hammer

imparts on the pile if the pile is surrounded entirely by loose sand so that after striking, the hammer does not

rebound off the pile.

End of Assignment