Forces

FORCES Sec 4 http://www.uq.edu.au/_School_Science_Lessons/PushPull0.GIF

BTEC, you should be able to: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Force ,[object Object],[object Object],[object Object],[object Object],PUSH PULL

Types of Forces ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Force ,[object Object],[object Object],[object Object],[object Object],[object Object]

Effect of force ,[object Object]

Understanding Net Force ,[object Object],[object Object],[object Object],10 N 5 N = 15 N

Understanding Net Force ,[object Object],[object Object],[object Object],10 N 5 N = 5 N

Net force ,[object Object],A 2N 8N A 6N B 2N 10N B 12N C 8N 8N C No net force D 3N 5N D 2N 10N

Net force ,[object Object],8N A 6N B 12N C No net force D 2N A 2N 8N B 2N 10N C 8N D 3N 5N 10N

Force ,[object Object],Net Force Mass Acceleration (N) (kg) (m/s 2 ) SI Unit: newton ; symbol : N

Quick Check ,[object Object],[object Object],[object Object],[object Object]

Quick Check ,[object Object],[object Object],[object Object],[object Object],[object Object]

Quick Check ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],3000 N 1000 N

Quick Check ,[object Object],[object Object],[object Object],[object Object],8000 N 10,000 N

Quick Check ,[object Object],[object Object],[object Object],[object Object],[object Object],8000 N 10,000 N

Mass and Weight ,[object Object],[object Object],[object Object],[object Object]

Mass ,[object Object],[object Object]

Mass ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Weight ,[object Object],[object Object],[object Object]

Weight ,[object Object],[object Object]

Weight ,[object Object],Weight = Mass x Gravitational of object of object strength (N) (kg) (N/kg)

Quick check ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Ask yourself, what is the mass of the book on the Moon? Has it changed? Can it change?

Quick check ,[object Object],[object Object],[object Object],[object Object]

Friction ,[object Object],[object Object],[object Object],[object Object],Force, F Friction

Friction ,[object Object],[object Object],Force, F Friction

Friction ,[object Object],[object Object],[object Object],Force, F Friction

Friction – What’s Good about it? ,[object Object],[object Object],[object Object]

Friction – What’s bad about it? ,[object Object],[object Object]

Solutions to overcome friction ,[object Object],[object Object],[object Object],[object Object],[object Object]

Quick check ,[object Object],[object Object],[object Object],[object Object],[object Object],5 kg 10 N 4 N

Quick check ,[object Object],[object Object],[object Object],20 kg 50 N Friction ? N 0.2m/s

Quick check ,[object Object],[object Object],20 kg 50 N Friction ? N 0.2m/s

Quick check ,[object Object],[object Object],[object Object],[object Object],20 kg 80 N Friction ? N

Forces

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