ENGG1300 Engineering Mechanics Assignment Term 2, 2025 | UNSW

Academic Year	2025

ENGG1300 Assignment T2

Attached is your Assignment for ENGG1300. Total number of questions: 10. 

All workings must be shown and handed in with detailed calculations. Presentation and neatness will also contribute towards your mark. 

This assignment is to be submitted through Moodle by 8 pm on Sunday, 10 August 2025, week 10. 

This Assignment will contribute 5%towards your final mark. 

Plagiarism will not be tolerated! Identical submissions will be marked zero regardless of who copied from whom. You are encouraged to work with your peers, but do not copy their work.

Question 1 

For the frame shown below, 

1) Find the reactions at A and E. 
2) Draw the axial force, shear force and bending moment diagrams for the frame, showing the magnitude of all peak values.

Question 2 

Calculate the reactions at B and F and draw the axial force, shear force and bending moment diagrams for the frame shown below. 

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Question 5 

For the section shown below, 

1) Find the coordinates of the centroid, xc and yc. 
2) Calculate the second moment of inertia Ix´ at the centroid. 

Note: all dimensions are in mm

Question 6

Particles A and B are travelling in the anticlockwise direction around a circular track at a speed of 8 m/s at the instant shown. If the speed of B is increased by 𝑑𝑣? /𝑑? = 4 𝑚/?2, and at the same instant, A has an increase in speed 𝑑𝑣? /𝑑? = 0.8? 𝑚/?2 . Determine the time when the first collision occurs, the magnitudes of accelerations 𝑎?of particle A and 𝑎? of particle B just before the first collision occurs.

Question 7 

For the system shown, the crank AB has a constant clockwise angular velocity of 2000 rpm. The length of the crank AB and the connecting rod BC is 75mm and 200mm, respectively. When α is 40°, determine the angular velocity 𝜔??of rod BC, the velocity 𝑣?and acceleration 𝑎? of point C

Question 8

The flexible band F is attached at E to the rotating sector and leads over the guide pulley. The band has a constant velocity of 4 m/s. 

1) Determine the angular velocities of AD and BD for the position shown. 
2) For the instant when BD is perpendicular to OA, determine the angular acceleration of B