Microsoft Word - Assignment_4_V7_2DME.docx Introductory Physics Assignment 3 – V7 CQUniversity Australia 1 Introductory Physics Assignment 3 This test covers material from the modules: ELEC, MAGN and...

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Microsoft Word - Assignment_4_V7_2DME.docx Introductory Physics Assignment 3 – V7 CQUniversity Australia 1 Introductory Physics Assignment 3 This test covers material from the modules: ELEC, MAGN and 2DME. INSTRUCTIONS: 1. Write your name on this paper 2. Sign the declaration 3. Show all working in the space provided Total Marks = 40 Student Number: Student Name: Assessment will not be marked unless the student signs the following declaration STUDENT DECLARATION I certify that this assessment item is my own work, based on my personal study and/or research, and I have not copied in part or whole or otherwise plagiarised the work of other students and/or persons. / / Signature Date SUBMISSION MARKS Marker’s Initials & Date of Marking Total: % Result: Introductory Physics Assignment 3 – V7 CQUniversity Australia 2 ELEC – Electricity 10 marks 1. A 35 Ω and a 65 Ω resistor are connected in parallel to 24 V power supply. a) Draw an electrical circuit diagram (1) b) What is the equivalent resistance? (2) c) What is the potential difference across each resistor? (1) d) What is the current that flows across each resistor (4) e) What is the power dissipated by each resistor? (2) (continue solutions onto next page) Introductory Physics Assignment 3 – V7 CQUniversity Australia 3 MAGN – Magnetism 10 marks 1. Two parallel wires separated by 16 cm are carrying currents of 14 A (left) and 22A (right) in the same direction (up the page). Draw a diagram to represent this and the magnetic field directions. Determine the magnetic field at position 3 cm to the right of the 22A wire. Calculate the distance where the magnetic field would be zero. (10) Introductory Physics Assignment 3 – V7 CQUniversity Australia 4 Introductory Physics Assignment 3 – V7 CQUniversity Australia 5 2DME – 2 Dimensional Mechanics 20 marks 1. A car travels due south for 23.0 10 m , then due east for 24.0 10 m . The trip takes 36 min. (4) (a) Draw a diagram, listing all relevant information (b) Calculate the displacement. (c) Calculate the average velocity in SI units (including the angle) Introductory Physics Assignment 3 – V7 CQUniversity Australia 6 2. A golf ball is struck at 120 km/hr at 40° to the horizontal, determine (7) (a) the horizontal component of the initial velocity (in m/s), (b) the vertical component of the initial velocity (in m/s), (c) the ball’s maximum height (d) how long the ball is in the air (e) the horizontal range (f) the velocity of the ball after 2.1 seconds Introductory Physics Assignment 3 – V7 CQUniversity Australia 7 Introductory Physics Assignment 3 – V7 CQUniversity Australia 8 3. A box of mass 24 kg is on a frictionless inclined plane of 32°. (4) (a) Draw a diagram, listing all relevant information (b) Calculate the normal force, the force parallel and the force perpendicular to the plane. (c) How much force is required to push the box up the inclined plane, so that it is accelerating at 3.5ms-1 Introductory Physics Assignment 3 – V7 CQUniversity Australia 9 4. A 95 kg box needs to be lifted to put on the back of a ute. The box is too heavy to be lifted directly onto the tray, 1.5 m high. You decide to use a frictionless ramp to slide the box from the ground onto the tray. (5) (a) Draw a diagram, listing all relevant information (b) Calculate the work required to lift the box onto the tray (c) If you wish to only use 2/5 of the force on the ramp, compared to lifting directly vertical, what length and angle should the ramp be?