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Forces T tension mass M mg In equilibrium T = mg weight weight W = Mg

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Presentation on theme: "Forces T tension mass M mg In equilibrium T = mg weight weight W = Mg"— Presentation transcript:

1 Forces T tension mass M mg In equilibrium T = mg weight weight W = Mg
If the pulley is smooth T1 = T2 T1

2 Reaction Forces In equilibrium N = mg N plank mg R N F Friction plank

3 Examples of other forces:
A person may push or pull an object An engine could pull an object Wind or air resistance may act Water can provide an upthrust Air causes lift and drag on an aircraft

4 Force Diagrams Weight Normal reaction Normal reaction Tension Pull
Resistance Engine force Weight Normal reaction Air resistance Weight Weight

5 Force Diagrams Lift Engine force Lift Drag Upthrust Weight Swimmer
Water resistance Wind Weight Normal reaction Weight Push Tension Air resistance Weight

6 Force Diagrams Forces on balloon Forces on Mr Bean
Mr Bean's weight Tension Wind Forces on Mr Bean Weight of balloon & Tension Lift Wind Weight Lift from weightlifter Forces on Weights Weights (weightlifter & weights) Normal reaction from floor Forces on Weightlifter

7 Normal reaction from ground Normal reaction from ground
Force Diagrams Weight Normal reaction from ground Tension Forces on man Man’s force Normal reaction from ground Forces on horse Weight Tension Horse resistance Weight Friction Normal reaction Desk Forces on book

8 Force Diagrams Forces on trailer Forces on car Forces on bag
Normal reaction from ground Forces on trailer Weight Tension Resistances Normal reaction from ground Forces on car Weight Engine force Tension & Resistances Weight of bag Tension Forces on bag Weight of tool box Normal reaction from table Tension Forces on tool box Friction

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