Unit 1 General physics
ExampleA Formula One car has a mass of 640kg (including the driver). When the engine exerts a driving force of 29000N, the opposing frictional force is 800N. Calculate the acceleration.
Draw a diagram showing the forces acting on the object and their directions.
Calculate the resultant (unbalanced) force.
F=29000 − 800=28200N
F = 29000 − 800 = 28200N Step 3
List all the information in symbol form and change into appropriate and consistent SI units if required.
Use and rearrange the correct formula.
F=ma => a= F
Calculate the answer by putting the numbers into the formula.
a = F
= 44.06m/s2 = 44m/s2
ALWAYS REMEMBER TO STATE THE UNIT FOR CALCULATED QUANTITIES.