1. Unit 1: FORCE

2.  Unit Objectives: ◦ Describe in your own words, what force is. ◦ Give examples of complex technological devices where force must be controlled, measured, or applied ◦ Describe what force, pressure, voltage and temperature difference have in common ◦ Describe or predict what happens to an object when forces on it are balanced and when forces on it are unbalanced. ◦ Measure force in mechanical, fluid, electrical and thermal systems. ◦ List occupations that require technicians to measure, control, or otherwise deal with force in complex devices.

3.  Forces are a part of our everyday activities  Mechanical, fluid, electrical and thermal energy systems involve forces.  A prime mover, such as an unbalanced force, pressure difference, voltage difference, or temperature difference, causes whatever it “acts” on to move.  Mathematics is essential for technicians working in advanced-technology occupations.

4.  Force is a push or a pull.

5. AA force can ◦C◦Cause an object to start moving or to move faster ◦C◦Cause a moving object to change direction ◦C◦Cause an object to slow down or to stop moving ◦C◦Change the shape of an object

6. FForce is what makes things move in a mechanical system. IIn a mechanical system, force is called the “prime mover.”

7.  Each system has a prime mover that acts very much like force. Energy SystemsPrime Movers MechanicalForce FluidPressure ElectricalVoltage ThermalTemperature Difference

8.  Automobile ◦ Mechanical – Pistons, connecting rods, crankshaft ◦ Fluid Systems – Hydraulic system transfers motion from the brake pedal to the brake shoes ◦ Electrical system – battery, alternator, spark plugs ◦ Thermal – or cooling system – radiator, fan and thermostat, water pump, liquid coolant,