Mechanic's Slide's

Mechanic's

• Mechanics
• Level 1 Science
• 1.1 Mechanic's
• AS 90940
• External
• 4 Credit's
• This achievement standard involves demonstrating understanding of aspects of mechanics and may include using methods when solving related problems.

Velocity V = D / T

• Speed is how fast something is going.
• Velocity is how fast something is changing position in a certain amount of time.
• Constant Velocity means an objects velocity is not changing.
• Non- Constant Velocity means the object is Accelerating or decelerating.
• The Gradient of a distance vs time graph is the velocity.
• Unit is ms-1
• https://youtu.be/hyHFylD00OU?list=PLFTQ1rw91BIHB0zyEK6S6T-GnPIdG_9qL (Embed)
• Caption: Velocity Learn Coach Video

Distance - Time Graphs

• Horizontal Line - Stationary
• Straight Line - Constant Speed (If this is sloping down the object will be returning to the start)
• Curved line - Accelerating or Decelerating
• https://youtu.be/9keMUFKhcS0?list=PLFTQ1rw91BIHB0zyEK6S6T-GnPIdG_9qL (Embed)
• Caption: Distance - Time Graphs

Acceleration A = V / T

• https://youtu.be/TFaTPxtmT50?list=PLFTQ1rw91BIHB0zyEK6S6T-GnPIdG_9qL (Embed)
• Caption: Acceleration
• Unit for Acceleration is ms-2
• The triangle means change in so you take the final speed minus the initial speed
• The gradient of the speed time graph is the acceleration.

Speed Time Graphs

• https://youtu.be/MQuEHQxZoQ4?list=PLFTQ1rw91BIHB0zyEK6S6T-GnPIdG_9qL (Embed)
• Caption: Speed Time Graphs
• Horizontal Line - Constant Speed
• Straight Line - Accelerating or Decelerating
• Area Below the graph is the total distance traveled.

Forces F = M x A

• https://youtu.be/b8oSYQG4NiY?list=PLFTQ1rw91BIHB0zyEK6S6T-GnPIdG_9qL (Embed)
• Forces change the speed of an object
• Net force is the overall force its like the leftover force when everything else is balanced out.
• Weight is the downward force due to gravity (N)
• Mass is the amount of matter in an object (kg)
• Measured in Newtons (N
• Balanced forces are were all the forces cancel out therefore there is no net force and the object is stationary or moving at a constant speed.
• Unbalanced forces are when the forces dont balance in a certain direction causing a net force which will mean the object is accelerating.
• Caption: Forces

Mass vs Weight

• https://youtu.be/2kcjkccpmdQ?list=PLJvaiIqsGS9iJr51CcRIYGLV95t6xCHvz (Embed)
• Mass is the amount of matter in an object whereas the weight is the downward force of an object due to gravity.
• Mass (m) is measured in kg
• Weight (w or f) is measured N
• On earth this downward force is 10N.
• Caption: M

Energy

• https://youtu.be/rriAlFGQJ7k?list=PLJvaiIqsGS9iJr51CcRIYGLV95t6xCHvz (Embed)
• Caption: Energy
• Energy isn't created or destroyed it can only be transferred into different types of energy.
• Gravitational Potential Energy
• Elastic Potential Energy
• Chemical potential Energy
• Heat + Light or Sound Energy
• Measured in joules J (make sure it is a capital)
• Change into kg first when measuring mass

Energy Continued

• https://youtu.be/-LVnV_hui0U?list=PLFTQ1rw91BIHB0zyEK6S6T-GnPIdG_9qL (Embed)
• https://youtu.be/ORc9Y2fehPw?list=PLFTQ1rw91BIHB0zyEK6S6T-GnPIdG_9qL (Embed)
• Caption: Kinetic Energy
• Caption: Gravitational Potential Energy

Power

• https://youtu.be/H8VZubIEV5g?list=PLFTQ1rw91BIHB0zyEK6S6T-GnPIdG_9qL (Embed)
• Power is how much work is being done per second.
• The unit for power (P) is Watts (W) or Js-1
• The unit for power is the same for pressure (P) so don't get caught by this.
• If something has a high power it means it can do a lot of work in a small amount of time.

Work

• https://youtu.be/obc8-uMBaOk?list=PLFTQ1rw91BIHB0zyEK6S6T-GnPIdG_9qL (Embed)
• Caption: Work
• Work is done when a force is applied over a certain distance.
• Work is being done if an energy conversion occurs.
• The unit for work is in J (Joules).

Pressure

• https://youtu.be/obc8-uMBaOk?list=PLFTQ1rw91BIHB0zyEK6S6T-GnPIdG_9qL (Embed)
• Pressure deals with force over an area.
• Small areas have high pressure and large area's have low pressure for the same force.
• Times or divide cm to get to m either by 100 then 10000 or just 100.