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Physics

Forces and Motion

QuestionAnswer
Thrust / Applied force. This is a force with is applied to an object by another object or by a person. If a person is pushing a desk across the room, then there is a ______ force acting upon the desk. This force is the force exerted on the desk by the person.
Weight force The force of gravity is the force with which the earth, moon, or other massive body attracts an object. All objects upon earth experience the force of gravity which is directed "downwards" towards the centre of the earth.
Support force A force that completely balances the weight of an object at rest.
Buoyancy force The upward force exerted by a fluid on an object that is partially or fully immersed in the fluid.
Friction force A contact force that acts against the movement of an object. It occurs when the surface of one object comes in contact with the surface of another.
Tension Force A pulling force exerted on an object by a string, rope or rod.
Magnetic force A force that acts at a distance between two magnetics.
Air resistance The force that acts in the opposite direction to an object moving through the air.
To get the weight of something you... Gravity x Mass
To calculate speed... Distance / time
To calculate distance... Speed x time
To calculate time.... Distance / speed
What direction do the magnetic lines go to? North to south
Types of forces - Thrust, magnetic, gravitational, support, tension, buoyancy, weight, friction and magnetic.
3 types of contact force Friction, support, thrust.
3 types of non-contact force Gravitational, magnetic, electrical.
When is something more stable? More base = more stability
To calculate force - Mass x acceleration
What is a force? A push or a pull or a twist
To decrease friction, you... Using lubricants such as oil or grease, making a surface smoother.
To increase friction, you... Making the surfaces rough, with gravel or sandpaper.
To calculate the average speed in a distance/time graph we...... Rise over run Distance / Time
Created by: Tasha_22098
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