Answer:
Max speed = ![\frac{15\, \pi}{4} \,\, \frac{m}{s}](https://tex.z-dn.net/?f=%5Cfrac%7B15%5C%2C%20%5Cpi%7D%7B4%7D%20%5C%2C%5C%2C%20%5Cfrac%7Bm%7D%7Bs%7D)
Max acceleration = ![\frac{15\,\pi^2}{16} \,\,\frac{m}{s^2}](https://tex.z-dn.net/?f=%5Cfrac%7B15%5C%2C%5Cpi%5E2%7D%7B16%7D%20%5C%2C%5C%2C%5Cfrac%7Bm%7D%7Bs%5E2%7D)
Explanation:
Given the description of period and amplitude, the SHM could be described by:
![f(x)=5\,sin(\frac{\pi}{4}x)](https://tex.z-dn.net/?f=f%28x%29%3D5%5C%2Csin%28%5Cfrac%7B%5Cpi%7D%7B4%7Dx%29)
and its angular velocity can be calculated doing the derivative:
![f(x)=5\, \,sin(\frac{\pi}{4}x)\\f'(x)=5\,\frac{\pi}{4}\,cos(\frac{\pi}{4}x)](https://tex.z-dn.net/?f=f%28x%29%3D5%5C%2C%20%5C%2Csin%28%5Cfrac%7B%5Cpi%7D%7B4%7Dx%29%5C%5Cf%27%28x%29%3D5%5C%2C%5Cfrac%7B%5Cpi%7D%7B4%7D%5C%2Ccos%28%5Cfrac%7B%5Cpi%7D%7B4%7Dx%29)
And therefore, the tangential velocity is calculated by multiplying this expression times the radius of the movement (3 m):
and is given in m/s.
Then the maximum speed is obtained when the cosine function becomes "1", and that gives:
Max speed = ![\frac{15\, \pi}{4} \,\, \frac{m}{s}](https://tex.z-dn.net/?f=%5Cfrac%7B15%5C%2C%20%5Cpi%7D%7B4%7D%20%5C%2C%5C%2C%20%5Cfrac%7Bm%7D%7Bs%7D)
The acceleration is found from the derivative of the velocity expression, and therefore given by:
![acceleraton(x)=-15\,\frac{\pi^2}{16}\,sin(\frac{\pi}{4}x)](https://tex.z-dn.net/?f=acceleraton%28x%29%3D-15%5C%2C%5Cfrac%7B%5Cpi%5E2%7D%7B16%7D%5C%2Csin%28%5Cfrac%7B%5Cpi%7D%7B4%7Dx%29)
and the maximum of the function will be obtained when the sine expression becomes "-1", which will render:
Max acceleration = ![\frac{15\,\pi^2}{16} \,\,\frac{m}{s^2}](https://tex.z-dn.net/?f=%5Cfrac%7B15%5C%2C%5Cpi%5E2%7D%7B16%7D%20%5C%2C%5C%2C%5Cfrac%7Bm%7D%7Bs%5E2%7D)
<span>Heat from the Sun is transferred to the sand without direct contact. This heat is then transferred to your feet by direct contact.</span>
Answer:
P = 0.25 W
Explanation:
Given that,
The emf of the battry, E = 2 V
The resistance of a bulb, R = 16 ohms
We need to find the power delivered to the bulb. We know that, the formula for the power delivered is given by :
![P=\dfrac{V^2}{R}\\\\P=\dfrac{2^2}{16}\\\\=0.25\ W](https://tex.z-dn.net/?f=P%3D%5Cdfrac%7BV%5E2%7D%7BR%7D%5C%5C%5C%5CP%3D%5Cdfrac%7B2%5E2%7D%7B16%7D%5C%5C%5C%5C%3D0.25%5C%20W)
So, 0.25 W power is delivered to the bulb.
acceleration = change in velocity/change in time
so...
a = 20 m/s / 2 seconds
a = 10
hope that helps :)
P.S. found this from Brainly User, sometimes all you have to do is search to find the answer.