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Ujian 1 BNJ 20103 Dinamik SEMESTER 1 SESSI 2017/2018: Answer All Questions

This document contains instructions and questions for an exam on dynamics. It includes 5 questions related to topics such as: 1) Determining speed, horizontal distance, and maximum height for a rider jumping off a slope. 2) Plotting velocity-time and acceleration-time graphs and determining average speed and distance traveled for a car. 3) Analyzing the motion of a pulley system using free body diagrams, velocity triangles, and determining relative velocity. 4) Calculating acceleration for a car traveling along a curve where speed is uniformly increased. 5) Determining velocity and acceleration for a water particle exiting a rotating sprinkler nozzle.

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Jimmy Kudi
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131 views3 pages

Ujian 1 BNJ 20103 Dinamik SEMESTER 1 SESSI 2017/2018: Answer All Questions

This document contains instructions and questions for an exam on dynamics. It includes 5 questions related to topics such as: 1) Determining speed, horizontal distance, and maximum height for a rider jumping off a slope. 2) Plotting velocity-time and acceleration-time graphs and determining average speed and distance traveled for a car. 3) Analyzing the motion of a pulley system using free body diagrams, velocity triangles, and determining relative velocity. 4) Calculating acceleration for a car traveling along a curve where speed is uniformly increased. 5) Determining velocity and acceleration for a water particle exiting a rotating sprinkler nozzle.

Uploaded by

Jimmy Kudi
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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UJIAN 1

BNJ 20103 DINAMIK


SEMESTER 1 SESSI 2017/2018
JABATAN TEKNOLOGI KEJURUTERAAN MEKANIKAL
FAKULTI TEKNOLOGI KEJURUTERAAN
ANSWER ALL QUESTIONS

QUESTION 1
Figure 1.0 below shows the riders jump off the slope at 30°, from a height of 1m. During the
race, it was observed that the rider remained in the air for 1.5 seconds.
a) Determine the speed at which he was traveling off the slope
b) Determine the horizontal distance he travels before striking the ground
c) Determine the maximum height the rider attains
Neglect the size of the bike and rider.
(10 marks)

QUESTION 2
Figure 2.0 below shows the v-t graph of a traveling car.
a) Plot/draft the a-t graph
b) Determine the average speed
c) Determine the distance traveled for 30 second
(10 marks)
QUESTION 3
Figure 3.0 below shows a dependent motion of the pulley system with block A has a speed of 18
m/s upslope.
a) By sketching the Free Body Diagram (FBD) of displacement and direction of velocity,
determine the speed of block B and also its direction (downslope or upslope?)
b) Sketch the velocity triangle diagram that consists of velocity B (VB), velocity A (VA) and
relative velocity A with respect to B (VA/B)
c) Determine the relative velocity A with respect to B (VA/B) in term of vector, magnitude and
also its direction (θ).
(10 marks)

QUESTION 4
Figure 4.0 below shows a car travels along the curve having a radius of 300 m. If its speed is
uniformly increased from 15 m/s to 27 m/s in 3 seconds.
 Determine the magnitude of its acceleration at the instant its speed is 20 m/s
(5 marks)
QUESTION 5
Figure 5.0 below shows at this instant the water sprinkler is rotating with an angular speed of 𝜃̇ =
2 𝑟𝑎𝑑/𝑠 and also the angular acceleration 𝜃̈ = 3 𝑟𝑎𝑑/𝑠 2. If the nozzle lies in the vertical plane water
is flowing through it at a constant speed rate of 𝑟̇ = 3 𝑚/𝑠.
a) Determine the magnitudes of the velocity of a water particle as it exits, the open end,
r=0.2m
b) Determine the magnitudes of the acceleration of a water particle as it exits, the open end,
r=0.2 m
(5 marks)

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