A 2.03 kg book is placed on a flat desk. Suppose the coefficient of static friction between the book and the desk is 0.442 and t
1 answer:
Answer:
a) 8.80 N
b) 4.78 N
Explanation:
The weight of the book is
By Newton's third law, the reaction from the table, R, is equal to its weight.
R = 19.9143 N
From the law of solid friction,
F is the maximum frictional force and is the coefficient of friction.
a) The force needed to begin moving the book is that needed to overcome static friction
b) The force needed to move the book at constant speed once it begins moving is that needed to overcome kinetic friction
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The answer is above but I don't know if it's correct.
Given:
The magnitude of each charge is q1 = q2 = 1 C
The distance between them is r = 1 m
To find the force when distance is doubled.
Explanation:
The new distance is
The force can be calculated by the formula
Here, k is the constant whose value is
On substituting the values, the force will be
<h2>Answer: decreasing</h2>
An RC circuit is an electrical circuit composed of resistors and capacitors, where the charging time of the circuit is proportional to the magnitude of the electrical resistance
and the capacity
of the capacitor.
As shown below:
In this context, the electrical resistance is the opposition to the flow of electrons when moving through a conductor.
Therefore:
<h2>When a capacitor is being charged in an RC circuit, the current flowing through a resistor <u>decreases</u>.</h2>
And the correct option is b.