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3 years ago

A girl rides her bike at 2.52 m/s on the way to her friends how which is 628 m away.

Physics

1 answer:

Harrizon [31]3 years ago

7 0

Answer: 249 seconds

Explanation:

Speed of bike = 2.52 m/s

Distance = 628 m

Time taken = ? ( let the unknown value be Z)

Recall that speed is the distance covered per unit time.

Hence, speed = Distance / Time taken

Time taken = Distance / speed

Z = 628m / 2.52 m/s

Z = 249.2 seconds (Round to nearest tenth i.e 249 seconds)

Thus, it takes 249 seconds for the girl to get to her friends house

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Answer:

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Explanation:

From the question we are told that

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The number of turns is N = 1500

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Generally the radius of the ring is

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=> $r = 0.009 \ m$

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=> $A = 2.545 *10^{-4}\ m^2$

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$\epsilon = A * \frac{dB}{dt}$

Here

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Here $\mu_o$ is the permeability of free space with value

$\mu_o = 4\pi *10^{-7} \ N/A^2$

$\frac{dB }{dt} = 4\pi * 10^{-7} * \frac{1500}{0.25} *\frac{20 }{1}$

=> $\frac{dB }{dt} = 0.150816\ T/s$

$\epsilon = 0.150816 * 2.545 *10^{-4}$

=> $\epsilon = 3.84 *10^{-5} \ V$

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