Astar tonnan tarsainn – duilgheadasan agus fuasglaidhean
1.
Ma tha an ùine a dh’ fheumar airson siubhal bho A gu B 2 dhiog, obraich a-mach astar na tonn transverse.
Aithnichte:
Astar AB = 6 meatairean gach diog
Eadar-ama AB = 2 diogan
A dhìth: Astar tonnan tarsainn
fuasgladh:
Tha 1 bàrr agus 1 troigh aig 1 tonn-fhaid . Tha 4 tonn-fhaid eadar A agus B. Tha an t-astar eadar A agus B 6 meatairean agus mar sin tha 1 tonn-fhaid ( λ) = 6 meatairean s / 4 = 1.5 meatairean s.
Is e 2 dhiog an ùine a dh’ fheumar airson siubhal bho A gu B agus mar sin is e an ùine a dh’ fheumar airson siubhal 1 tonn-fhaid = ùine (T) = 2 diog air ds / 4 = 0.5 diog air ds.
Co-aontar astar nan tonn:
v = λ f = λ / T
v = astar na tonn , λ = tonn-fhaid , f = tricead , T = ùine
Astar na tonn:
v = 1.5 meatairean s / 0.5 diogan conds
v = 3 mheatair s /se cond
2. Ma tha an ùine a dh’fheumar airson siubhal bho A gu B 8 diogan, obraich a - mach astar na tonn-tharraing.
Aithnichte:
Tha dà thonnan-fhaid ann.
1 tonn-fhaid ( λ) = 2 x 4 meatairean s = 8 meatairean s
Ùine (T) = 8 diogan / 2 thonnan-fada = 4 diogan / tonn - fada
A dhìth: Astar tonn (v)
fuasgladh:
Tha astar tonn air a thomhas le bhith a’ cleachdadh co-aontar astar tonn:
v = f λ = λ/T
v = 8 meatairean s / 4 diogan conds
v = 2 mheatair s /se cond
