Confirm if this is correct or not. If it isn't correct, please correct it.
1 answer:
Answer:
d = 421.83 m
Explanation:
It is given that,
Height, h = 396.9 m
Horizontal speed, v = 46.87 m/s
We need to find the distance traveled by the ball horizontally. Let t is the time taken by the ball. Using second equation of motion for vertical direction. So,
Now d is the distance covered by the cannonball. So,
Hence, this is the required solution.
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Answer: The Electrostatic force of attraction or repulsion between two charges shows that the Newton's third law applies to electrostatic forces.
Explanation: Consider two Oppositely charged charges separated by distance d.
The electrostatic force exerted by charge 1 on charge 2 is.
By Coulomb's Law :
F1 = k .....................................(1)
The electrostatic force exerted by charge 2 on charge 1 is.
F2 = - k ................................. (2)
negative sign shows that force are in opposite direction.
From Equation 1 and 2
F1 = - F2
Which implies Newton Third law.
The two objects after (b) are at the same potential
Explanation:
When the two conducting objects are connected together, charge will be transferred from one object ot another until the two objects reach the same potential.
In fact, if there is still some residual potential difference between the two objects, there would still be a net electric field pushing the charges from one object to the other. Therefore, equilibrium is reached only when the net electric field between the two objects becomes zero, and this occurs only when the potential difference is zero, so when the two objects are at the same potential.
At the equilibrium, however, the charge on the two objects can be different. In fact, the capacity of an object is given by
where Q is the charge stored by an object and V is its potential. It can be re-arranged as
The two objects are at same potential, V, however their capacity C can be different since the two objects are not identical: therefore, their stored charge can be different.
Learn more about electric fields:
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