1) velocity: 98 m/s downward
Explanation:
The marble moves by uniformly accelerated motion, with constant acceleration a=g=-9.8 m/s^2 directed towards the ground. Therefore, its velocity at time t is given by:
where
is the initial velocity
is the acceleration
is the time
Substituting t = 10 s, we find:
And the negative sign means the direction of the velocity is downward.
2) Distance covered: 490 m
The distance covered in an uniformly accelerated motion can be found with the formula:
where
is the acceleration
t is the time
Substituting t=10 s, we find
And the negative sign means the displacement is below the dropping point.
Answer:
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Explanation:
Using a free body diagram, it is proved that when the object starts to slide, the tangent of the angle of inclination is equal to the coefficient of static friction:
Hence, you can use that formula directly:
Rounding to the nearest degree that is 31º.
Answer:
The correct answer is option B) Mechanical waves tend to have longer wavelengths.
Explanation:
Before we begin, let's clarify what these two types of waves are.
Both electromagnetic waves and mechanical waves are classified by their ability to transmit energy in empty space.
<u>Electromagnetic waves are capable of doing that, but mechanical waves are not.</u>
The light waves that reach our planet are an example of electromagnetic waves.
On the other hand, mechanical waves need a medium to be able to move energy, it is not the same as with electromagnetic waves that are capable of transporting it on their own.
An example of a mechanical wave is sound. Sound is not capable of traveling in empty space.
This leads us to the conclusion that Mechanical waves tend to have longer wavelengths.
If you want to resolve conflict you to have
the ability to tell the truth, no matter what
the strength, to handle the truth
the full story
the facts to back up what you believe
Answer:
F = 29.484 N
Explanation:
The force on the rod can containing the current placed in external magnetic field is:
F = BIL
where,
B = magnitude of the field
I = current in the loop
L = length
then,
F = 7.80 * 18.0 * 0.21
F = 29.484 N