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Preparation
- Videos Chapter 1.1a, Chapter 1.1b, Chapter 1.1c
- Google Quiz
Participation - Assignment P.7 Q4-7, P.34 Q19
Presentation - Blackboard, Student's Work
Chapter 1.1a (1:52) - 441
Chapter 1.1b (2:40) - 362
Chapter 1.1c (1:52) - 292
Possession - Chapter 1.1
> Length is measured in meters (m), Time is measured in seconds (s)
> mm - millimeter, milli-second (ms), km - kilometer (km), us - micro-second
> Always try to measure a larger quantity to reduce percentage error in measurement
> Stop-watch: 0.2s+0.2s = 0.4s reaction time error
> Ruler: 1/2 x (min division) for each end, if two ends, then error = min division
> speed = width of card / time measured for running trolley with erect card
Preparation
- Video Chapter 1.2
- Google Quiz
Participation - Assignment P.12 Q5-6, P.34 Q26, Q24 except (c)
Presentation - Blackboard, Student's Work
Chapter 1.2 (3:32) - 342
Possession - Chapter 1.2
> Distance is a scalar, Displacement is a vector
> Vector has both magnitude (i.e. size) and direction
> Displacement is a vector that directs from the initial to the final position.
> Sometimes, you have to use Pythagoras theorem to find displacement.
Preparation
- Videos Chapter 1.3a, Chapter 1.3b
- Google Quiz
Participation - Assignment P.21 Q9-11, P.35 Q22, 20, 27
Presentation - Blackboard, Student's Work
Chapter 1.3a (4:26) - 351
Chapter 1.3b (4:36) - 291
Possession - Chapter 1.3
> Velocity is a vector, it has both magnitude and direction
> Velocity is the rate of change of displacement, unit is ms-1
> Acceleration is the rate of change of velocity, unit is ms-2
> 100 kmh-1 ~ 27ms-1
> Instantaneous speed / velocity is the speed / velocity at that particular time
Preparation
- Video Chapter 1.4
- Google Quiz
Participation - Assignment P.29 Q8-11, P.35 Q23, 25, 29 and 30
Presentation - Blackboard, Student's Work
Chapter 1.4 (6:12) - 346
Possession - Chapter 1.4
> Along a straight line, velocity is either positive or negative, which represents its direction.
> Usually, upward(rightward) is taken to be positive, downward(leftward) is taken to be negative.
> +5ms-1 and -5ms-1 have the same magnitude but opposite in direction.
> A higher acceleration means the velocity changes more per second.
> Acceleration is zero when speed is maximum.
> Direction of motion = direction of velocity
> Direction of motion and direction of acceleration can be different!
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