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18 Cards in this Set
- Front
- Back
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Force |
A push or pull that changes an objects speed, direction or shape. SI unit is Newton (N) |
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Newton |
SI unit for force (N) |
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Balanced Forces |
An objects motion does not change (constant velocity) or its stationary. Opposing forces are in equilibrium. No net force. |
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Unbalanced Forces |
An objects motion does change (accelerates or decelerates). Opposing forces are not in equilibrium. |
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Force: Thrust |
Force to push an object in a specific direction. Also known as F traction. |
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Force: Support |
Force that opposes gravitational force. Also known as F normal. |
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Force: Gravity |
Downward force applied to an object on Earth. Also known as F gravity. |
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Force: Friction |
Force that opposes the movement of an object. Apart from friction between two or more objects there is also air resistance (drag). Also known as F friction |
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Mass |
The amount of matter contained in an object. SI unit is kilograms (kg) |
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Weight |
The force of gravity acting on an objects mass. SI unit is Newton (N) |
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Drag |
A force that opposes the motion of an object through fluid or air (water resistance or air resistance).
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Formula: Pressure |
Pressure= Force (N)/ Area ( ) SI unit is pascal (P) |
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Formula: Area |
Area= Force (N)/ pascal (P) SI unit is metres squared ( ) |
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Formula: Force |
Force=mass (kg) x acceleration ( )
Force=Pressure (P) x acceleration ( ) |
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Driving Force (force of thrust from the motor) |
Driving Force> resistive forces= acceleration Driving Force= resistive forces= constant speed Driving Force< resistive forces= deceleration |
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Gravitational Acceleration |
Acceleration due to gravity is a constant 10 metres per second or 10 Newton per kilogram |
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Terminal Velocity |
When an object falls, the force acting downwards is gravitational acceleration and upwards it is air resistance. |
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Pressure |
Pressure is less when applied to a large area.
Pressure is greater when applied to a small area.
Pressure= Force ( )/ area (A) |
