How to Calculate Net Force

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Presentation transcript:

How to Calculate Net Force

What is a force? Force is a push or pull in a particular direction.

Forces can affect motion in several ways: They can: make objects start moving Change direction

FORCE FACTS: Measured in Newton's (N) Forces usually act in pairs Forces act in a particular direction Usually cannot be seen

How to Calculate Net Forces When two forces act in the same direction on an object, the net force is equal to the sum of the two forces 8N 14N 6N

How to Calculate Net Forces Continued When two unequal forces act in opposite directions on an object, the net force is the difference of the two forces 18N 50N 32N

Force, Mass, Acceleration Force = Mass x Acceleration F= ma How much force is required to accelerate a 50 kg mass at 4 m/s2? F= ? F= 50 kg * 4 m/s/s M= 50 kg A= 4 m/s/s F= 200 N

What is the acceleration of a 7 kg mass being pulled by a 56 N force? F=ma M= 7 kg 56N = 7 kg * A A= ? 8 m/s/s

What is the mass of a block accelerating at 2 m/s2 and pushed by a 9 N force? F=ma M= ? 9N = M * 2 m/s/s A = 2 m/s/s 4.5 kg