## MAS112 Vectors and Mechanics

Both semesters, 2021/22 | 20 Credits | ||||

Lecturer: | Dr Rekha Jain | Timetable | Reading List | ||

Aims | Outcomes | Assessment | Full Syllabus |

The module begins with the algebra of vectors, essential for the study of many branches of applied mathematics. The theory is illustrated by many examples, with emphasis on geometry including lines and planes. Vectors are then used to define the velocity and acceleration of a moving particle, thus leading to an introduction to Newtonian particle mechanics. Newton's laws are applied to particle models in areas such as sport, rides at theme parks and oscillation theory.

**Prerequisites:** A-level mathematics (or equivalent)

**Corequisites:** MAS110 (Mathematics Core I); MAS111 (Mathematics Core II)

The following modules have this module as a prerequisite:

MAS280 | Mechanics and Fluids |

MAS314 | Introduction to Relativity |

MAS315 | Waves |

MAS324 | Quantum Theory |

MAS413 | Analytical Dynamics and Classical Field Theory |

## Aims

- Introduce students to applied mathematics through the theory and application of vectors;
- To develop the students' knowledge of mathematical modelling by applying Newton's laws to particle models in areas such as sport, rides at theme parks and oscillation theory.

## Learning outcomes

- Demonstrate knowledge of vector algebra up to (and including) triple products;
- Apply vector methods to simple problems in 2D and 3D geometry;
- Understand the formulation of simple mathematical models and their limitations;
- Obtain the velocity and acceleration of a particle, given its position vector as a function of time;
- Demonstrate knowledge of relative motion and motion under a constant acceleration, including projectiles;
- Understand motion in a circle with uniform angular speed;
- Calculate work done by a force, kinetic energy, power and use these quantities in solving problems;
- Investigate the motion of a particle moving in a vertical circle;
- Use their knowledge to model applications of circular motion;
- Solve differential equations including linear first order and second order with constant coefficients and interpret these solutions;
- Use and apply results from mathematical models based on differential equations.

40 lectures, 20 tutorials

## Assessment

Semester 1 coursework (10%) Semester 2 coursework (10%)

One formal 2 hour written examination at the end of semester 2. All questions compulsory (80%).## Full syllabus

**Vector geometry**

Vectors as displacements of space. Addition, subtraction, multiplication by a scalar. Position vector. Cartesian basis, co-ordinates. Scalar product. Vector product. Triple products. Applications throughout geometry especially lines and planes.

**Kinematics**

The path of a particle given its position vector as a function of time. Differentiation of vectors with respect to a scalar; velocity, acceleration. Motion in a circle with constant speed. Relative motion.

**Motion with constant acceleration**

Motion in a straight line. Motion near the Earth's surface under gravity. Projectiles (no air resistance). Examples from sport.

**Newton's laws**

Force, momentum. Newton's laws of motion. Newton's law of gravitation, gravitational acceleration. Planetary orbits, Kepler's third law. Impulse, conservation of momentum. Types of force. Resistance proportional to speed : one-dimensional case.

**Circular motion**

Kinematics of circular motion. Conical pendulum. Normal contact force. Friction. Penny on turntable. Penny on turntable with banking. Vertical circular motion.

**Work and energy**

Kinetic energy. Work. Work-energy equation. Gravitational potential energy. Conservation of mechanical energy (KE+PE). Power. Hooke's law. Elastic potential energy (EPE). KE + PE + EPE = constant.

**Oscillations**

Oscillations : horizontal spring, simple harmonic motion, amplitude, frequency. Vertical spring. Damped oscillations: damping factor, weak, strong and critical damping. Forced oscillations, resonance.

## Reading list

Type | Author(s) | Title | Library | Blackwells | Amazon |
---|---|---|---|---|---|

B |
Hirst | Vectors in two or three dimensions | 516.182 (H) | Blackwells | Amazon |

C |
Atkin | Mechanics | 531 (M) | Blackwells | Amazon |

C |
Burghes | Further mechanics | 531 (B) | Blackwells | Amazon |

C |
Collinson and Roper | Particle mechanics | 531.16 (C) | Blackwells | Amazon |

C |
Dyke and Whitworth | Guide to mechanics | 531 (D) | Blackwells | Amazon |

(

**A**= essential,

**B**= recommended,

**C**= background.)

Most books on reading lists should also be available from the Blackwells shop at Jessop West.