Mass multiplied by acceleration produces force.
The acceleration is (v - 0)/t in this situation, where t seems to be the time it takes automobile A to come to a stop. According to Newton's third law of motion, the automobile produces this turning force of the wall, however the wall, which really is static and indestructible, forces an equal force back on the car.
According to Newton's third law, each action has an equal and opposite response. On this basis, you may deduce that a car driving into a wall would exert force on the wall. However, since the wall did not move, the automobile receives an equivalent force, causing it to collapse.
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Answer:
The fundamental frequency at which the sound of speakers at the microphone produce constructive interference is 801.076458 Hz
Explanation:
For a given arrangement having constructive interference, we have;
R₁ - R₂ = 2·x = 0 + n·λ
The distance from one speaker to the microphone. R₁ = 4.50 m
The distance between the two speakers = 2.00 m
The angle formed between the direction from the microphone to the speaker closest and the directional path between the speakers = 90°
Therefore, by Pythagoras's theorem, the distance from the speaker furthest from the microphone, to the microphone, 'R₂' is given as follows;
R₂ = √(4.50² + 2.00²) = √(24.25) = 4.9244289009 ≈ 4.924
∴ R₂ ≈ 4.9244289 m
R₂ - R₁ = 4.9244289 m - 4.5 m = 0.4244289 m
For constructive interference, R₂ - R₁ =0.4244289 m = n·λ
For n = 1, we have;
R₂ - R₁ =0.4244289 m = n·λ = 1 × λ = λ
λ = 0.4244589 m
f = v/λ = 340 m/sec/(0.4244289 m) ≈ 801.076458 Hz
Therefore the lowest possible fundamental frequency at which the speakers produce constructive interference, f = 801.076458 Hz
The way I do it is suddenly, in the same sort of way that magicians try to pull a table cloth off a table when there's things on the table cloth.The sudden approach acts as an impulse of force and starts to accelerate the roll. But, the piece (assuming it has perforations) is off the roll before the roll can move, due to inertia. Then the roll will acclerate, move, slow down and stop. However, in accelerating, the roll will unravel. The bigger the impulse the more it will unravel.+++++++++++++++++++++++++++++++++++++++If on the other hand, the piece of paper is held firmly, and the roll is pulled, then the impulse is presumably given to the paper and the hand whose inertia is a lot more than that of the roll. So, I think I'd actually go for choice c)+++++++++++++++++++++++++++++++++++++This assumes that the roll is free to rotate.I think that a similar idea is behind the design and use of a "ballistic galvanometer". The charge is passed through the galvanometer quickly, as a current pulse. Then the needle starts to deflect, and the deflection is arranged to depend on the total charge that has passed through in the time of the current pulse.
