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3 years ago

14

the parking brake on a 1200kg automobile has broken, and the vehicle has reached a momentum of 7800.m/s. what is the velocity of

the vehicle?

1 answer:

Softa [21]3 years ago

4 0

Answer:

6.5 m/s

Explanation:

Momentum = mass × velocity

p = mv

7800 kg m/s = (1200 kg) v

v = 6.5 m/s

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A solenoid has a radius Rs = 14.0 cm, length L = 3.50 m, and Ns = 6500 turns. The current in the solenoid decreases at the rate

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Answer:

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Explanation:

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here we have

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now we have

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now the induced EMF is rate of change in magnetic flux

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now for induced electric field in the coil is linked with the EMF as

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$E(2\pi r_c) = \mu_o N^2 \pi R_s^2 \frac{di}{dt}/L$

$E = \frac{\mu_o N^2 R_s^2 \frac{di}{dt}}{2 r_c L}$

$E = \frac{(4\pi \times 10^{-7})(6500^2)(0.14^2)(79)}{2(0.20)(3.50)}$

$E = 58.7 V/m$

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