Unit 1: Energy
Unit 2: Electricity
Unit 3: Particle Model of Matter
Unit 4: Atomic Structure
Unit 5: Forces
Unit 6: Waves
Unit 7: Electromagnetism
Unit 8: Space
Drag / air resistance / water resistance / friction Reaction / upthrust / lift Push / driving force Weight
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A contact force is a force that is applied when an object comes into contact with another object. Contact force is governed by Newton's Laws of Motion. Examples of contact forces include kicking a ball or walking.
A non-contact force is when a force is applied to an object without directly touching it. For example, weight is a non-contact force.
Newton's Laws: 1) An object will remain in a constant state of motion unless acted upon by an external force. 2) Force = Mass x Acceleration 3)Every force has an equal and opposite reaction.
Scalar: A quantity that has magnitude, but no direction. Mass, Volume, Speed. Vector: A quantity that has magnitude and direction. Force, Velocity, Moment.
The concept of motion is that if clockwise and anticlockwise moments are equal, then the object is in equilibrium. Examples of when moment is applied is in the use of levers, such as seesaw and crowbar. A lever is where on force (called effort) is used to overcome another force (called a load).
Safety Features of Cars. Seat Belts - absorb energy. Airbags - absorb energy. Crumple Zone - absorb energy These increase the amount of time it takes to come to a stop, which reduces acceleration and force, thus reducing injury.
Required Practicals: Acceleration: falling masses and trolley Extension of a Spring: put a weight on a spring - measure length.
