3 years ago

A skydiver falls from rest through air and reaches teminal velocity

Physics

1 answer:

Arte-miy333 [17]3 years ago

3 0

Answer:

B constant at 10m/s²

Explanation:

Newton's second law. An object moving only because of gravity is said to be free falling. All objects accelerate at the same rate of 9.8m/s²

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F = 50 N<br> m = 72 kg<br> m/s2

lyudmila [28]

Answer:

Explanation:

F=ma

a=F/m

a=50/72=

a=0.694

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The process of converting a liquid to a gas is known as _____.

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This is called vaporization.

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The magnitude of Earth’s magnetic field is about 0.5 gauss near Earth’s surface. What’s the maximum possible magnetic force on a

vampirchik [111]

Answer:

$F = 1.5 \times 10^{-16} N$

this force is $1.68 \times 10^{13}$ times more than the gravitational force

Explanation:

Kinetic Energy of the electron is given as

$KE = 1 keV$

$KE = 1 \times 10^3 (1.6 \times 10^{-19}) J$

$KE = 1.6 \times 10^{-16} J$

now the speed of electron is given as

$KE = \frac{1}{2}mv^2$

now we have

$v = \sqrt{\frac{2 KE}{m}}$

$v = 1.87 \times 10^7 m/s$

now the maximum force due to magnetic field is given as

$F = qvB$

$F = (1.6\times 10^{-19})(1.87 \times 10^7)(0.5 \times 10^{-4})$

$F = 1.5 \times 10^{-16} N$

Now if this force is compared by the gravitational force on the electron then it is

$\frac{F}{F_g} = \frac{1.5 \times 10^{-16}}{9.1 \times 10^{-31} (9.8)}$

$\frac{F}{F_g} = 1.68 \times 10^{13}$

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