The minimum force required to lift the box at constant velocity is determined as 274.4 N.
<h3>
Minimum force required</h3>
The minimum force required to lift the box at constant velocity is the tension in one of the pulleys, and the magnitude is calculated as follows;
2T = mg
where;
- m is mass of the box
- T is the minimum force required
2T = mg
T = mg/2
T = (56 x 9.8)/2
T = 274.4 N
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Answer:
81.2 A
Explanation:
The magnetic field at the center of a current-carrying loop is given by
where
is the vacuum permeability
I is the current in the loop
R is the radius of the loop
In this problem, we have:
d = 12 cm is the diameter of the loop, so its radius is
R = d/2 = 12/2 = 6 cm = 0.06 m
is the magnetic field at the center
Therefore, the current in the loop must be:
Answer:
the electric force and the magnetic force.
The reflected ray is rotated through 12°.
<h3 /><h3>What is reflection?</h3>
Freflection can be defined as the turning back of a ray of light when its strikes a plane's surface.
There are 2 laws of reflection
<h3>Laws of reflection</h3>
(1) The first law of reflection states that the incident ray the reflected ray and the normal all at the point of incidence lie in the same plane
(2) The second law of reflection states that the angle of incident is equal to the angle of reflection.
From the question, if the incidence ray is rotated through 6°, then the reflected ray is rotated through 12°
Hence, The reflected ray is rotated through 12°.
Answer:
THE LAW OR PRINCIPLE OF SUPERPOSITION; States that when two identical waves are brought, the resultant disturbance is the algebraic sum of the individual disturbances of the two waves.
Explanation:
Most stationary waves are obtained as a result of the combination or superposition of an incident wave and it's reflected wave. Like in music, they result from the stationary waves of plucked strings leading to the Superposition law.
Peace.