Answer:
Explained
Explanation:
The electrons get rubbed off some items onto others. This causes an excess or electron on one item and deficiency of electron on the other. Therefore an electrostatic force of attraction is produced and hence clothes often cling together after tumbling in a clothes dryer
Answer:
v = 6.06 m/s
Explanation:
In order for the rider to pass the top of the loop without falling, his weight must be equal to the centripetal force:
![Centripetal Force = Weight \\\frac{mv^2}{r} = mg\\\\\frac{v^2}{r} = g\\\\v = \sqrt{gr}](https://tex.z-dn.net/?f=Centripetal%20Force%20%3D%20Weight%20%5C%5C%5Cfrac%7Bmv%5E2%7D%7Br%7D%20%3D%20mg%5C%5C%5C%5C%5Cfrac%7Bv%5E2%7D%7Br%7D%20%3D%20g%5C%5C%5C%5Cv%20%3D%20%5Csqrt%7Bgr%7D)
where,
v = minimum speed of motorcycle at top of the loop = ?
g = acceleration due to gravity = 9.8 m/s²
r = radius of the loop = diameter/2 = 7.5 m/2 = 3.75 m
Therefore, using these values in equation, we get:
![v = \sqrt{(9.8\ m/s^2)(3.75\ m)}](https://tex.z-dn.net/?f=v%20%3D%20%5Csqrt%7B%289.8%5C%20m%2Fs%5E2%29%283.75%5C%20m%29%7D)
<u>v = 6.06 m/s</u>