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liubo4ka [24]
4 years ago
5

The acceleration of a particle is given by a = -kt^2, where a is in meters per second squared and the time t is in seconds. If t

he initial velocity of the particle at t=0 is__________.
Physics
1 answer:
QveST [7]4 years ago
4 0

Answer:

Velocity is zero.

Explanation:

Given:

  • acceleration of particle, a=-k.t^2\ m.s^{-2}
  • time of observation, t=0\ s

We know that acceleration is defined as the rate of change in velocity and hence we integrate the expression of acceleration.

<u>Now the velocity can be given as:</u>

v=\int\limits {a} .\, dt=-k.\frac{t^3}{3}

Put t = 0 we get:

v=0\ m.s^{-1}

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The rectangular coils in a 345-turn generator are 12 cm by 12 cm. Part A
Likurg_2 [28]

Answer:

118.166 volt

Explanation:

We have given number of turns N =345

Sides of the rectangular coils is 12 cm =0.12 m

So area A =0.12×0.12=0.0144 m^2

Magnetic field B =0.45 T

Angular speed =505 rpm

Speed in rad/sec \omega =\frac{2\pi N}{60}=\frac{2\times 3.14\times 505}{60}=52.8566rad/sec

The emf is given by E=NAB\omega SIN\omega t

For maximum emf sinwt =1

So E=345\times 0.0144\times 0.45\times 52.8566=118.166volt

4 0
3 years ago
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Explanation:

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