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3 years ago

14

Muscles that are fatigued ____. A. Are injured , B. Should always be rested , C. Can sometimes be exercised further D. Should be

stretched

2 answers:

Lorico [155]3 years ago

5 0

Answer:

<u>B. Should be rested</u>

Explanation:

That is the only reasonable answer.

Anestetic [448]3 years ago

4 0

Answer:

d

Explanation:

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2 years ago

The famous scientist Galileo Galilei did several experiments with sloping planes, which he rolled metal balls down so that he co

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3 years ago

A car traveling at 27.4 m/s hits a bridge abutment. A passenger in the car, who has a mass of 65.0 kg, moves forward a distance

Minchanka [31]

Answer:

$F=43570.9N$

Explanation:

We can calculate the acceleration experimented by the passenger using the formula $v_f^2=v_i^2+2ad$ , taking the initial direction of movement as the positive direction and considering it comes to a rest:

$a=\frac{v_f^2-v_i^2}{2d}=\frac{-v_i^2}{2d}$

Then we use Newton's 2nd Law to calculate the force the passenger of mass m experimented to have this acceleration:

$F=ma=\frac{-mv_i^2}{2d}$

Which for our values is:

$F=\frac{-(65kg)(27.4m/s)^2}{2(0.56m)}=43570.9N$

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3 years ago