Answer:
Correct answer: Cf = tan 33° = 0.649 (I guess you meant degrees and not minutes)
Explanation:
The horizontal component of the object's weight equals to the force of friction and the object is just about to slide.
The horizontal component of the object's weight is Qh = mg sin 33°
The force of friction is Ffr = Cf · Qv = Cf · mg cos 33° , where Cf is the coefficient of static friction and Qv vertical component of the object's weight
Qh - Ffr = 0 => Qh = Ffr => mg sin 33° = Cf mg cos 33°
we divide both sides of the equation by mg and get:
Cf · cos 33° = sin 33° => Cf = sin 33° / cos 33° = tan 33° = 0.649
Cf = 0.649 the weight of the object is unnecessary data
God is with you!!!
The value of energy of a peach that is raw is reported as a number of kilocalories. There are a number of calorie table depending on how a person desire to eat peach including dried, frozen, canned and fresh. This will enable a person to be aware for your calorie intake.
Explanation :
It is given that, q and 4q are placed at a distance of l.
Let x is the distance where third charge is placed so that the entire three charge system is in static equilibrium.
Equilibrium means the net force acting on the system of charges is equal to zero. Let Q is the third charge.
So,
On solving,
For magnitude :
using
So, a charge of -4q/9 is at a distance of l/3 is placed. It is placed to the right of +q.
Burning of paper is the answer
Answer:
Part A:
Part B:
Explanation:
<u>Given:</u>
- = initial velocity of the electron =
- = electric field strength = 9100 N/C
<u>Assumptions:</u>
- = mass of the electron =
- = final velocity of the electron = 0 m/s
- = distance at which the electron comes to rest
- = magnitude of charge on an electron =
- = taken by the electron to return to its initial position
- = displacement of the electron
Part A:
Since the electron moves in the direction of the electric field, the electric force will act on it in the direction opposite to electric field. This electric force does work on it to make the electron come to rest.
Using the work-energy theorem, the work done by the electric field will be equal to the kinetic energy change of the electron.
Hence, the electron comes to rest by travelling a distance of .
Part B:
In this part, let us first find out the acceleration of the electron due to the electric force.
The electron moves with the above acceleration constantly as it moves in the uniform electric field.
Since the electron is supposed to move from a point and then again move back to the same point. This means the displacement of the electron is zero.
Since the electron starts moving at t = 0 s.
Hence, the electron returns to the starting position after .