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STALIN [3.7K]
3 years ago
9

Points A, B, and C form the vertices of a triangle in a nonuniform electrostatic field. The electrostatic work done on a particl

e of charge q as the particle travels from A to B is WAB and that done on the particle as it travels from A to C is WAC=−WAB/3.
a) How much electrostatic work is done on the particle as it travels from B to C?
Physics
1 answer:
Trava [24]3 years ago
4 0

Answer:

Explanation:

Let electric potential at A ,B and C be Va , Vb and Vc respectively.

Work done = charge x potential difference

Wab = q ( Va - Vb )

Wac =  q (  Va -  Vc )

Given

Wac = - Wab / 3

3Wac = - Wab

Now

Wbc = q ( Vb - Vc )

= q [ ( Va-Vc ) - ( Va - Vb )]  

= Wac - Wab

= Wac + 3Wac

= 4Wac

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Calculate the speed of an object that tavels 62.43m in 38.4s
TiliK225 [7]
The speed of the object can be calculated using the formula:

Speed = distance/time

The given values are:
distance = 62.43 m
time = 38.4 s

Solution:

speed = 62.43 m / 38.4 s = 1.63 m/s

Therefore, the speed of an object that travels 62.43m in 38.4s is <span> 1.63 m/s.</span>
8 0
3 years ago
A 75-g mass sits 75 cm from the center of a rotating platform undergoing a uniform angular acceleration of 0.125 rad/s^2. The co
jasenka [17]

Answer:

velocity of mass when it slides of will be 1.36 m/sec

So option (b) will be correct option.

Explanation:

We have given mass of the slits m = 75 gram = 0.075 kg

Radius r = 75 cm = 0.75 m

Coefficient of kinetic friction \mu =0.250

Acceleration due to gravity g=9.8m/sec^2

When the mass slides of

\frac{mv^2}{r}=\mu mg

v=\sqrt{\mu rg}=\sqrt{0.250\times 0.75\times 9.8}=1.36m/sec

So velocity of mass when it slides of will be 1.36 m/sec

So option (b) will be correct option.

3 0
3 years ago
A motor is used to lift a 10 kg mass 2 m above the ground in 4 s. If the power input to the motor is 100 W. what is the efficien
Bad White [126]

Answer:

98%

Explanation:

Given parameters

Mass of motor = 10kg

Height = 2m

Time = 2s

Power input = 100w

Unknown

Efficiency = ?

Solution

Efficiency is the percentage of the power output to the power input.

Power is the rate at which work is done.

Power output = mass x g x height / time

g is the acceleration due to gravity

Power output = 10x 2 x 9.8 / 2 = 98W

Efficiency = power output/ power input x 100

Efficiency = 98/100 x 100 = 98%

7 0
3 years ago
-2
photoshop1234 [79]

Answer:-2

Explanation:

7 0
2 years ago
25. How long does it take a child on a swing to complete one swing if her center of gravity is 4.00 m below the pivot?
Lina20 [59]
  • Length=l=4m

\\ \rm\rightarrowtail T=2\pi\sqrt{\dfrac{l}{g}}

\\ \rm\rightarrowtail T=2\pi\sqrt{\dfrac{4}{9.8}}

\\ \rm\rightarrowtail T=2\pi(0.63887)

\\ \rm\rightarrowtail T=1.27774\pi

\\ \rm\rightarrowtail T=4.012s

4 0
3 years ago
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