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Artyom0805 [142]
2 years ago
13

At what speed does a 1400 compact car have the same kinetic energy as a 20000 truck going 25 ?

Physics
1 answer:
kumpel [21]2 years ago
4 0
K=1400*V^2/2
K=20000*25^2/2. => 1400*V^2/2=20000*25^2/2 <=> 1400*V^2=20000*25^2
14*V^2=200*225
v^2=100*225/7
v=250/7^(1/2)

Answer: 250*7^(1/2)/7
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A uniform metal tube of length 5m and mass 9kg is suspended by two vertical wires attached at 50cm and 150cm respectively from t
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Answer:

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F = 2F

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F = 29.4 and 2F = 58.8 N

force (tension) of 29.4 N (upward)  in 100 cm

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