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marissasusievalles
01.07.2020 •
Physics
Which simple machine turns about a fixed point called a fulcrum? a pulley a lever a screw a wedge
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Ответ:
Lever
Explanation:
Fulcrum point is the point where the lever turns.
It is the center of a key activity
Ответ:
Correct a₂ > a₁
Explanation:
Given:
Tony mass = m₁ = 50 kg
Sam mass = m₂ = 45 kg
According to Newton's second law, the formula for calculating force is:
F = m · a
In this case we have the same force for both
F = m₁ a₁ = m₂ a₂ => a₁ / a₂ = m₂ / m₁ = 45 / 50 = 9 / 10 = 0.9
a₁ = 0.9 a₂ => a₁ = 90% of a₂ => a₂ > a₁
a₂ > a₁
God is with you!!!