Answer:
1) 4 x 25m = 100m
2) 0 because after 4 lengths, he's back at the starting block.
3) speed is distance over time so speed here is 100m/125s = 0.8m/s
4) ...
5) 100m / 1.25m/s = 80s
6.a) 100m / 0.5m/s = 200s
7.b) ... can't draw this now..
The change in position of an object is called motion of that object.
Answer:
Position.
Explanation:
Motion can be defined as a change in location with respect to a reference point.
This ultimately implies that, motion would occur as a result of a change in location (position) of an object with respect to a reference point or frame of reference i.e where it was standing before the effect of an external force.
Mathematically, the motion of an object is described in terms of acceleration, time, distance, speed, velocity, displacement etc.
A complete description of your position includes a distance, direction, and reference point. Thus, this includes an object's distance in a certain direction from a reference point.
Responda:
30.0066 m
Explicação:
Dado o seguinte:
Temperatura (t1) = 5 ° C
Comprimento (L1) = 30m
Temperatura (t2) = 25 ° C
Coeficiente de expansão linear do aço (α) = 11 × 10 ^ -6 ° C-1
Lembre-se:
Expansibilidade linear (α):
Alteração do comprimento / comprimento original (diferença de temperatura)
α = [ΔL / L1 (ΔT)]
α = [(L2 - L1) / L1 (T2 - T1)]
α * L1 (T2 - T1) = (L2 - L1)
11 × 10 ^ -6 * 30 (25-5) = L2 - 30
11 × 10 ^ -6 * 30 (20) = L2 - 30
11 × 10 ^ -6 * 600 = L2 - 30
6600 × 10 ^ -6 = L2 - 30
L2 = 0,0066 + 30
L2 = 30.0066m