3 years ago

Rank the four fundamental forces from strongest to weakest

Physics

1 answer:

kvasek [131]3 years ago

3 0

1) the strong nuclear force, 2) the electromagnetic force, 3) the weak nuclear force, and 4) gravity

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A baseball player slides into third base with an initial speed of 4.0 m/s . if the coefficient of kinetic friction between the p

satela [25.4K]

The work done by the friction force to stop the player is equal to his loss of kinetic energy:
$W= \Delta K$

The work done by the friction force is the magnitude of the force $\mu m g$ times the distance covered by the player, d:
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The loss in kinetic energy is simply equal to the initial kinetic energy of the player, since the final kinetic energy is zero (the player comes to rest):
$\Delta K=K_i = \frac{1}{2}mv^2$

Substituting into the first equation, we get:
$\mu m g d= \frac{1}{2}mv^2$
from which we find d, the distance covered by the player:
$d= \frac{v^2}{2 \mu g}= \frac{(4.0 m/s)^2}{2 \cdot 0.4 \cdot 9.81 m/s^2}=2.04 m$

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3 years ago

Describe a situation where you might have high velocity but low acceleration

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In a level cruise on a passenger airliner, flying in a straight line at a steady 550 miles per hour.
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You look down at your phone GPS and it tells you the local park is 2 miles away. This is not a straight path and you will need t

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<h2><u>Distance.</u></h2>

<u> $\infty \infty$ </u>