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drek231 [11]
3 years ago
14

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

Physics
1 answer:
gayaneshka [121]3 years ago
4 0

Work = force x distance

So we are looking for something related to displacement.

The work done must also be done in the same direction, parallel to the displacement, and therefore in the same direction of the motion as well.


So:

In order to do work, the force vector must be in the same direction as the displacement vector and the motion.

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Matt is driving his car around a curve that has a radius of 40 m. If his speed is 25 m/s as he negotiates the curve, find the ce
s344n2d4d5 [400]

Answer:

\huge\boxed{\sf a_{c} = 15.6\ m/s^2}

Explanation:

<u>Given Data:</u>

Radius = r = 40 m

Speed = v = 25 m/s

<u>Required:</u>

Centripetal Acceleration = \sf a_{c} = ?

<u>Formula:</u>

\sf a_{c} = \frac{v^2 }{r}

<u>Solution:</u>

\sf a_{c} = \frac{v^2}{r} \\\\a_{c} = \frac{(25)^2}{40} \\\\a_{c} = \frac{625}{40} \\\\a_{c} = 15.6 m/s^2\\\\\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3>
7 0
3 years ago
A device for acclimating military pilots to the high accelerations they must experience consists of a horizontal beam that rotat
slava [35]

Answer: the angular frequency is 2.31 rad/s

Explanation:

The data we have is:

Radial acceleration A = 27.9 m/s^2

Beam length r = 5.21m

The radial acceleration is equal to the velocity square divided the radius of the circle (the lenght of the beam in this case)

And we can write the velocity as:

v = w*r where r is the radius of the circle, and w is the angular frequency.

w = 2pi*f

where f is the "normal" frequency.

So we have:

A = (v^2)/r = (r*w)^2/r = r*w^2

We can replace the values and find w.

27.9m/s^2 = 5.21m*w^2

√(27.9/5.21) = w = 2.31 rad/s

8 0
3 years ago
When a wire is made thicker its resistance what?
NeTakaya
Making a wire thicker has the same effect as making a road wider. It makes it easier for the electron traffic to flow. The resistance decreases, and the current (traffic) increases.
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Two flat glass plates are separated at one end by a wire of diameter 0.20 mm; at the other end they touch. Thus, the air gap bet
stepan [7]

Answer:

668 bright fringes

Explanation:

t = Thickness = 0.2 mm

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m = Number of fringes

We have the fringe width relation

2t=\left(m+\frac{1}{2}\right)\lambda\\\Rightarrow m=\dfrac{2t}{\lambda}-\dfrac{1}{2}\\\Rightarrow m=\dfrac{2\times 0.2\times 10^{-3}}{600\times 10^{-9}}-\dfrac{1}{2}\\\Rightarrow m=666.166\approx 667

So, total number of fringes will be including m = 0 is 1+667=668

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