Because the idea that the ground that we live, stand, and build on is actually moving beneath us blew the minds of scientists.
Answer:
The electric field does positive work on the charge.
The potential energy associated with the charge decreases.
Explanation:
We know that force due to electric filed on a charge particle q given as
F = q E --------1
If the positive charge is moving in the direction of electric filed it means that force due to electric field and displacement of particle due to motion is in the same direction.So the work done due to electric filed will be positive.
Work = Force . Displacement
W= F.d
F= W/d ---------2
From equation 1 and 2
W/d = q E
W/ q = E/ d
We know that voltage difference ΔV
ΔV = E/ d
ΔV =W/ q
So the potential difference will be decrease because charge is positive.So the potential energy will be decreases.
Answer:
Average speed = 129 m/min
Explanation:
The length of the wood log = 1161 metres
Time = 9 minutes
Speed =![\frac{distance}{Time}](https://tex.z-dn.net/?f=%5Cfrac%7Bdistance%7D%7BTime%7D)
So Speed = ![\frac{1161}\frac{9}](https://tex.z-dn.net/?f=%5Cfrac%7B1161%7D%5Cfrac%7B9%7D)
= 129 metres/minute
Therefore the average speed = 129 m/min
It depends on the type of question, mechanical condition and given values,
You can use the formula,
Coefficient of kinetic friction = Force of Kinetic friction / Normal force (perpendicular to contacting surfaces)
Hope this helps!