mech p part 1 Forces

​Revision for Unit 1

B - Static engineering

This lesson / Quiz will help you revise Static engineering Systems

​Revision for Unit 1

B - Static engineering

This lesson / Quiz will help you revise Static engineering Systems

Recall, perform procedures, demonstrate an understanding of and analyse information and systems, involving:

• Non-concurrent coplanar forces:

o representation of forces using space and free body diagrams

o moments

o resolution of forces in perpendicular directions Fx = Fcosθ, Fy = Fsinθ

o vector addition of forces – resultant, equilibrant and line of action o conditions for static equilibrium ΣFx = 0, ΣFy = 0, ΣM = 0

• Simply supported beams:

o concentrated loads

o uniformly distributed loads (UDL).

• Reactions: o support reactions o pin reaction forces o roller reaction forces

Coplanar Points

Points that lie on the same plane

Multiple Select

Name Three points that are coplanar

• D

• F

• H

• K

Multiple Choice

Name a point that is coplanar with points A, B, C?

• O

• D

• H

• P

Open Ended

Come up with your own definition of what a resultant force is without looking it up. Look at the picture to guide you.

​Concurrent forces

Concurrent forces are two or more forces whose lines of action intersect at the same point .  

​Non-Concurrent coplanar forces

means that the force act in different lines but only on one plane, i.e in two dimensions. There will be a resultant force and resultant moment of force but only in the plane of the paper

Multiple Choice

Identify one method that would be used to find the density of a material

• Archimedes’ principle

• Pythagoras’ theorem

• Kirchhoff’s law

• Newton’s law

Multiple Choice

Identify the unit of measure for shear stress.

• Kilograms per metre squared

• Litres squared per second

• Metres squared per second

• Newtons per metre squared

Fill in the Blanks