<span>when a wave causes vibration in a nearby object that matches the frequency of the wave, the phenomenon that occurs is called resonance.
It produces a sound of larger amplitude as a result of vigorous vibration of the body.
</span>
Explanation:
Below are attachments containing the solution.
<span> (13.89 - 5.56) m/s /30 s = 8.33 / 30 = 0.278 m/s^2 </span>
<span>F = MA </span>
<span>F = 150 kg * 0.278 = 41.65 N </span>
<span>#2) Newton's Equations of motion </span>
<span>distance = 0.5 * acceleration * time^2 + original velocity * time </span>
<span>velocity = acceleration * time + original velocity </span>
<span>First we need acceleration </span>
<span>F = MA </span>
<span>7 N = 0.4 kg*A (NOTE: I converted to consistent units: kg, m, s) </span>
<span>A = 7/.4 = 17,5 m/s^2 </span>
<span>V = at + Vo </span>
<span>80 m/s = 17.5 /s^2 * t + 0 (Started at rest) </span>
<span>80 = 17.5 t </span>
<span>t = 4.57 s </span>
<span>#3 </span>
<span>First we need the weight of the book on the floor </span>
<span>F = MA (A = 9.8 m/s^2 the acceleration of gravity) </span>
<span>F = 0.4 kg * 9.8 m/s^2 = 3.92 N </span>
<span>Now we need the Net Force on the book slowing it down (A = - 1.5 m/s^2) </span>
<span>F = MA </span>
<span>F = 0.4 kg * 1.5 m/s^2 = 0.6 N </span>
<span>===> Friction is 0.6 N greater than your push or 5.6 N </span>
<span>Weird!!! That means friction is greater than the weight of the book </span>
<span>Mu (coff of friction) = Friction Force/Weight = 5.6 / 3.92 = 1,43 ( Nonsense answer) </span>
<span>#4 We can do as a ratio </span>
<span>70/400 = 1500/x </span>
<span>70 x = 600,000 </span>
<span>x = 8,571 N</span>
Acceleration = (final velocity - initial velocity) / time
Acceleration = 20 - 0 / 3.5
= 5.714 m/s^2
Hope it helped!
Answer:
The difference is the SI units used.
Explanation:
