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3 years ago

Although we talk about the velocity of an object in Uniform Circular Motion as being

Physics

2 answers:

DaniilM [7]3 years ago

8 0

Answer:

The speed is constant.

Speed is a scalar quantity (magnitude only).

Velocity is a vector quantity (magnitude and direction).

For an object in Uniform Circular Motion the change in velocity is always

directed towards the center of the circle, and this change of velocity

gives rise to the acceleration which is directed towards the center of

rotation. This is called the centripetal acceleration, and it is the centripetal

force (for instance the attraction of the moon towards the earth) which

produces the centripetal acceleration.

rodikova [14]3 years ago

3 0

Answer:

The speed is constant.

Explanation:

In reality in circular motion the velocity is never constant because the object keeps changing direction in a continuous fashion. Remember velocity is measured by magnitude and direction. However we use the term constant velocity to mark constant speed for convenience.

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What characteristics of matter he was studying

Levart [38]

Answer:

The main physical characteristics of matter are mass, volume, weight, density, odor, and color. These are the characteristics that help us to see matter, feel matter, and taste matter.

Explanation:

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3 years ago

Why are voltages always measured between two points??

sukhopar [10]

Answer:

We describe electrical circuits similarly: current is the rate at which charge flows past a point, while the voltage is effectively like an electrical “pressure.” Voltage is always measured between two points and indicates the force “pushing” charges to flow from one point to another.

7 0

3 years ago

The potential energy for a certain mass moving in one dimension is given by U(x)=(2.0J/m3)x3−(15J/m2)x2+(36J/m)x−23JU(x)=(2.0J/m

Angelina_Jolie [31]

Answer:x=2 and x=3

Explanation:

Given

Potential Energy for a certain mass is

$U(x)=2x^3-15x^2+36x-23$

and we know force is given by

$F=-\frac{\mathrm{d} U}{\mathrm{d} x}$

$F=-(2\times 3x^2-15\times 2x+36)$

For Force to be zero F=0

$\Rightarrow 6x^2-30x+36=0$

$\Rightarrow x^2-5x+6=0$

$\Rightarrow x^2-2x-3x+6=0$

$\Rightarrow (x-2)(x-3)=0$

Therefore at x=2 and x=3 Force on particle is zero.

8 0

3 years ago

Using the law of conservation of energy, what is the kinetic energy at B? K.E. = 3, 6, or 4.8

musickatia [10]

Answer:

Explanation:

7 0

3 years ago

If a nearsighted person has a far point df that is 3.50m from the eye, what is the focal length f1 of the contact lenses that th

olga55 [171]

Answer:

f1= -350cm or -3.5m

f2= 22.1cm or 0.221m

Explanation:

A person is nearsighted when the person's far point is less than infinity. A diverging lens is normally used to correct this eye defect. A diverging lens has a negative focal length as seen in the solution attached.

Farsightedness is when a person's near point is farther than 25cm. This eye defect is corrected using a converging lens. The focal length of a converging lens is positive. This is evident in the solution attached. The near point is also referred to as the least distance of distinct vision.

3 0

3 years ago