Topic 2 - Motion and Forces 2.1-2.9 0.0 / 5 ? PhysicsForces and MotionGCSEEdexcel Created by: prodbyteeCreated on: 28-01-20 16:50 Scalar Quantities Scalar Quantities have magnitude (size) but no specific direction 1 of 15 Vector Quantities: Vector Quantities have magnitude(size) and a specific direction. 2 of 15 Scalar Vs Vector Quantities: Vector Quantities have both magnitude and an associated direction. Scalar Quantities only have magnitude. 3 of 15 Scalar Quantity Examples: Temperature, Mass, Energy, Distance, Speed, Density. 4 of 15 Vector Quantity Examples: Force, Weight, Displacement, Velocity, Acceleration, Momentum. 5 of 15 Velocity: Velocity is speed in a stated direction. 6 of 15 Formula relating average speed/m/s , distance/m and time/s: average speed = distance / time 7 of 15 Average Speed symbol equation: s=d/t 8 of 15 Formula relating distance travelled/m , average speed/m/s and time/s: distance travelled = average speed × time 9 of 15 Speed from Distance-Time Graphs: The speed of an object is determined using the gradient of a distance-time graph. 10 of 15 Acceleration: Acceleration is the rate of change of velocity(m/s2). 11 of 15 Acceleration symbol equation: a= (v-u)/t 12 of 15 Formula involving acceleration/m/s2, change in velocity/m/s and time taken/s: acceleration = change in velocity / time taken 13 of 15 Formula relating final velocity/m/s, initial velocity/m/s, acceleration/m/s2 and distance/m: (final velocity)2 /(m/s)2 – (initial velocity)2/(m/s)2 = 2 × acceleration/m/s2 × distance/m 14 of 15 Symbol equation involving velocity, acceleration and distance: (v2-u2)=2 × a × x 15 of 15
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