Mechanics

• what are the forces acting on an object?

  >friction, normal reaction force , weight , tension
• given constant acceleration(newtons 1st law), what are the 5 quantities of motion?(suvat)

  >s- acceleration

  >u- initial velocity

  >v- final velocity

  >a- acceleration

  >t-time
• what are the equations linked to constant acceleration?


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• what is the particle modelling assumption?

  >mass of the object is concentrated at one point(therefore,rotational,air resistance can be ignored)
• what is the modeling assumption of a particle on a rough/smooth surface?

  >the object does/does not experience friction
• what is the modelling assumption of a smooth/light pulley?

  > no friction,pulley has no mass, tension is the same of either side
• an inextensible string?

  >acceleration is the same in any connected object
• is displacement a scalar or a vector quantity?


  >vector
• Difference between Distance & Displacement

  The key difference is that Distance measures the actual path length, while Displacement measures the straight-line distance between the starting and ending points.
• what is velocity?

  >is the rate of change of displacement
• what is acceleration?

  rate of change of velocity
• what dies the gradient on the displacement-time graph indicate?

  >velocity
• what does the gradient in the velocity-time graph indicate?

  >acceleration
• what is newtons first law?

  >it states that an object will remain at rest or continue to move in a straight line unless acted upon by a resultant force
• what is newtons second law of motion?

  >it states that the force needed to accelerate an object is the product of its mass and acceleration of the particle
• what is newton's third law of motion?

  >it states that every action has equal and opposite reaction