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What do Balanced forces do?
They cancel each other out
What is the equation for resultant force?
Resultant force= Mass x Acceleration
What is Newton’s First Law?
It states that “an object will remain at rest or at a constant velocity unless it is acted upon by an external or resultant force”
What is an example of inertia?
When a vehicle stops, you will jerk forward before stopping, and when it moves again you’ll jerk backwards
What is weight?
Weight is the force of gravity acting on an object
Weight WILL change in space.
What is Mass?
Mass is the amount of matter in an object
Mass will NOT change in space
What is the equation for Weight?
Weight = Mass x Gravitational Field Strength
What is Earths Gravitational Field Strength? include units
10N/kg
What do UNbalanced forces cause?
The motion of an object to change
What end of a vehicle will experience more force to cause acceleration?
The front end
What end of a vehicle will experience less force to cause deceleration?
The Back end
What can newton’s second law be used to calculate?
The resultant force of an object Resultant Force = Mass x Acceleration
What is Newron’s Third Law?
It states that: “If body A exerts a force on body B, body B will exert an equal and opposite force on body A”
Give an example of newton’s third law
the propeller of a boat pushes the water backwards, so the water pushes the boat forwards with a force the same size but opposite direction
What is Terminal Speed?
The forces acting on an object moving become equal in both directions etc a sky diver
What are the 5 stages of a sky diver diving?
Air resistance weaker then gravity, diver accelerates
Air resistance increases with speed
Forces become equal, reaching terminal velocity
Sky diver opens parachute, wider surface area increasing air resistance
forces balance out again and diver now has a much lower terminal velocity
Note
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