2 years ago

A parked car begins to roll down a hill, what can you conclude from that observation?

1 answer:

3 0

Answer:

its The rolling friction is greater than the force of the car’s weight against the hill.

and A force was required to start the car rolling.

Explanation:

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Nonamiya [84]

Answer:

e= 0.440 mV(millivolt)

Explanation:

Given Magnetic field B= 0.50T

$A_{1}=3\times10^{-3}$

$A_{2}=1.6\times10^{-3}\\$

Δt= 1.6sec

$induced emf e=\frac{\mathrm{d} \phi }{\mathrm{d} t}$

⇒ $e=B\frac{\mathrm{d} A}{\mathrm{d} t}$

$e=0.50\times\frac{3\times10^{-3}-1.6\times10^{-3}}{1.6}$

$e=0.440\times10^{-3} volt$

e= 0.440 mV(millivolt)

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