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-BARSIC- [3]
3 years ago
5

Find the net work done by friction on the body of a snake slithering in a complete circle of 1.04 m radius. The coefficient of f

riction between the ground and the snake is 0.25, and the snake's weight is 78.0 N.
Physics
1 answer:
Firdavs [7]3 years ago
7 0

Answer:

The net work done by friction is 127.42 J.

Explanation:

Given that,

Radius = 1.04 m

Coefficient of friction = 0.25

Weight = 78.0 N

We need to calculate the work done

The work done is the product of force and displacement.

work\ done = kF\cdot d

work\ done =k\times W\times 2\pi r

Here, F = mg = W(weight)

work\ done = 0.25\times78.0\times2\pi\times1.04

work\ done = 127.42\ J

Hence, The net work done by friction is 127.42 J.

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noname [10]
Lol, I remember I helped my sister with this question but anyways, the card flew because of inertia and the quarter fell in the glass because of gravity :).
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3 years ago
A driven RLC circuit is being driven by an AC emf source with a maximum current of 2.75 A and maximum voltage of 150 V. The curr
weqwewe [10]

Answer:

(a). Z = 54.54 ohm

(b). R = 36 ohm

(c). The circuit will be Capacitive.

Explanation:

Given data

I = 2.75 A

Voltage = 150 V

\phi = 0.85 rad = 48.72°

(a). Impedance of the circuit is given by

Z = \frac{V}{I}

Z = \frac{150}{2.75}

Z = 54.54 ohm

(b). We know that resistance of the circuit is given by

R = \frac{Z}{\sqrt{1 + \tan^{2}\phi } }

Put the values of Z & \phi in above formula we get

R = \frac{54.54}{\sqrt{1 + \tan^{2} ( \ 48.72) } }

R = 36 ohm

(c). Since the phase angle is negative so the circuit will be Capacitive.

3 0
3 years ago
Cold butter placed on hot corn melts because of convection.<br> agree <br> disagree<br> it depends
frozen [14]

Explanation:

Cold butter placed on hot corn melts because of convection. Butter placed on hot corn melts because it touches the hot corn. Most of the heat is transferred through conduction

7 0
3 years ago
PLEASE HELP!
Anna [14]

Answer:

Explanation:

At constant pressure , work done by gas = P x ΔV where P is pressure and ΔV is change in volume

ΔV = 9.2 - 5.6 = 3.6 L

3.6 L = 3.6 x 10⁻³ m³

ΔV = 3.6 x 10⁻³ m³

P = 3.7 x 10³ Pa

So work done

= 3.7 x 10³ x 3.6 x 10⁻³ J

= 13.32 J .

( c ) is the answer , because work is done by the gas so it will be positive.

5 0
3 years ago
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vaieri [72.5K]
I’m going to say B

I hope this helped
4 0
3 years ago
Read 2 more answers
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