What does a mechanical engineer do?

#### Overview

###### Automotive

###### Aerospace

###### Robotics

#### Exciting new areas

###### Renewable energy (like wind, solar)

###### 3D printing

###### Nanotechnology

#### Functions of a mechanical engineer

###### Design

In this virtual tour you will understand how a mechanical engineer designs products by working on similar engineering assignments.

**Note:**

Assignments are quite simplified compared to real work so that high school students can solve them

**Tour Compatibility:** Tours can be viewed well only on laptops/desktops and not on mobile phones currently.

#### What will I study in mechanical engineering?

###### Fluid Mechanics

Study of fluids (liquids, gases) at rest and in motion, and the forces involved

** Practical example**

Fluid systems in aircrafts, pumps, brakes

###### Related high school topics

Pressure in fluids, streamline flow, Bernoulli’s principle, viscosity, Reynolds number, surface tension

###### Mechanics of Solids

Study of motion and deformation of solids under the action of forces

** Practical example**

Load carrying components for vehicles

###### Related high school topics

Elastic behaviour of solids, stress and strain, Hooke’s law, stress-strain curve, elastic moduli

###### Thermodynamics

Study of heat and temperature and their relation to energy and work

** Practical example**

Coffee-maker, air-conditioner

###### Related high school topics

Thermal equilibrium, heat, internal energy, work, laws of thermodynamics, specific heat capacity, thermodynamic state variables & equation of state, heat engines, refrigerators, heat pumps, Carnot engine

# Pre-requisites

Understanding of below concepts and equations (wherever mentioned) is required

### Pascal’s law

Pascal’s law states that a change in pressure at any point in a fluid in a closed container is transmitted undiminished to all points in the fluid.

By Pascal’s law:

P_{1} = P_{2}

F_{1}/A_{1} = F_{2}/A_{2}* (Since pressure equals force per unit area)*

*(where P = pressure, F = force, A = area)*

### Friction force

Kinetic friction force between two solid surfaces in contact is the force that opposes the relative motion of those surfaces.

f = μN

*(where f = friction force, μ = coefficient of friction, N = normal force)*

### Torque

Torque is the cross product of position vector (from the axis of rotation to the point where force is applied) and the force vector (which tends to produce rotational motion).

τ = r x F

*(where τ = torque vector, r = position vector, F = force vector)*

### Stress

When a body is subjected to a deforming force, a restoring force is developed in the body. This restoring force per unit area is known as stress.