POUVEZ VOUS maider a la B C D svp MERCI D 'AVANCE.... Pergunta de ideia deasertghj

asertghj @asertghj

January 2021 1 29 Report

POUVEZ VOUS maider a la B C D svp MERCI D 'AVANCE

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MonsieurFirdown

Verified answer

Bonjour

♧1. On a :
● 38 t --> 38000 Kg
● 108 km/h --> 108÷3,6 = 30 m/s

♧2. On a :
Ec = $\frac {1}{2}$ ×m × v²
Ec = $\frac {1}{2}$ × 38000×30²
Ec = 17100000 J

♧3. On a :
17100000 = $\frac {1}{2}$ × 1200 × v²
17100000 = 600 × v²
$\frac {17100000}{600}$ = v²
28500 = v²
v = √28500
v = 168,8194302 m/s

♧4. Je te laisse conclure. ...

Voilà ^^

0 votes Thanks 1

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