Answer:
48 m
Explanation:
Two trains traveling towards one another on a straight track are 300m apart when the engineers on both trains become aware of the impending Collision and hit their brakes. The eastbound train, initially moving at 97.0 km/h Slows down at 3.50ms^2. The westbound train, initially moving at 127 km/h slows down at 4.20 m/s^2.
The eastbound train
First convert km/h to m/s
(97 × 1000)/3600
97000/3600
26.944444 m/s
As the train is decelerating, final velocity V = 0 and acceleration a will be negative. Using third equation of motion
V^2 = U^2 - 2as
O = 26.944^2 - 2 × 3.5 S
726 = 7S
S = 726/7
S1 = 103.7 m
The westbound train
Convert km/h to m/s
(127×1000)/3600
127000/3600
35.2778 m/s
Using third equation of motion
V^2 = U^2 - 2as
0 = 35.2778^2 - 2 × 4.2 × S
1244.52 = 8.4S
S = 1244.52/8.4
S2 = 148.2 m
S1 + S2 = 103.7 + 148.2 = 251.86
The distance between them once they stop will be
300 - 251.86 = 48.14 m
Therefore, the distance between them once they stop is 48 metres approximately.
Answer:
his starting velocity was 18.297 ms⁻¹
Explanation:
v = u + at .................. (1)
Where
Final Velocity (v) = 0 ms⁻¹
Initial velocity (u) = ?
Acceleration (deceleration) (a) = -6.42 ms⁻²
time (t) = 2.85 s
Substituting all parameters into equation (1)
0 = u + (-6.42)2.85
0 = u + (-18.297)
0 = u - 18.297
18.297 = u
∴ the initial velocity was 18.297 ms⁻¹
It increases the magnetic attraction between the electromagnet(s)
Answer:
density
Explanation:
Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth.
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Answer:
depends if it is wireless
Explanation:
if not a socket in a wall or surface. if not then it will probably use batteries.
