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Novosadov [1.4K]

3 years ago

14

If a football player collides with a goal post, what forces are at work?

1 answer:

AlekseyPX3 years ago

7 0

When a footballer collides with the goal post, the forces at work are the action and reaction forces. The player will exert an action force on the goal post, and then a reaction force from the goal post will stop the player. The reaction force call will cause pain and even injury to the player.

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3 years ago

In an RLC series circuit that includes a source of alternating current operating at fixed frequency and voltage, the resistance

maw [93]

Answer:

Capacitive Reactance is 4 times of resistance

Solution:

As per the question:

R = $X_{L} = j\omega L = 2\pi fL$

where

R = resistance

$X_{L} = Inductive Reactance$

f = fixed frequency

Now,

For a parallel plate capacitor, capacitance, C:

$C = \frac{\epsilon_{o}A}{x}$

where

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Now, if the distance reduces to one-third:

Capacitance becomes 3 times of the initial capacitace, i.e., x' = 3x, then C' = 3C and hence Current, I becomes 3I.

Also,

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Also,

Z ∝ I

Therefore,

$\frac{Z}{I} = \frac{Z'}{I'}$

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3 years ago

a mass is measured as 6.2kg in one experiment and as 6.20kg in another. in what way do these two measurements differ?

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Answer:

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Explanation:

8 0

3 years ago

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