BRAINCAKEMotion
Revision notes for Motion in AQA Physics (7407). Read the start of any lesson here, then sign in free for the whole lesson, the R.E.C.I.P.E. recall steps and the quiz.
- Speed and VelocityScalar and Vector Quantities scalar vector distance displacement speed velocity Speed is a scalar quantity.
- Average Speed and Instantaneous SpeedMotion at Constant Speed in a Straight Line speed = distance time Average Speed Average speed = total distance total time Instantaneous Speed…
- Distance-time GraphsDistance-Time Graph gradient = speed
- Displacement-time GraphsDisplacement-Time Graphs p>Ball thrown in the Air
- Uniform AccelerationAcceleration is the change in velocity per unit time.
- Non-uniform AccelerationWhen the acceleration is non-uniform, either the speed or direction changes.
- Constant Acceleration FormulaeFinal velocity = initial velocity + additional velocity due to acceleration v = u + a t so v2 = u2 + 2as displacement = average velocity × time. s =…
- Inclined Plane TestGalileo timed a ball as it rolled down a plank.
- Acceleration Due to GravityThe acceleration of free Fall is the acceleration due to gravity g = 9.81ms-2 near the Earth's surface.
- Practical: Measuring gYou can measured g by using an electronic timer and motion sensor or the apparatus shown below A ball is released from rest from an electromagnet.
- Distance-Time vs Displacement-Time Graphsgradient = velocity = zero at max height
- Speed-time vs Velocity-time GraphsIn a velocity-time graph, the gradient = acceleration, the area under the graph = displacement from the starting position.
- ProjectilesA projectile is any object acted upon only by the force of gravity.
- Vertical ProjectionVertical Motion is motion under gravity.
- Horizontal ProjectionHorizontal Motion follows Newton's Ist Law.
- Projectile MotionIf a ball is thrown at angle θ, vertically, the projectile undergoes free fall under gravity.
- The Effect of Air ResistanceAir resistance is a drag force caused by friction between layers of air near the projectile's surface The horizontal component reduces the…