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Todd asked in Science & MathematicsPhysics · 7 days ago

Physics ASAP!?(1/2)?

A record has an angular speed of

37.3 rev/min.

What is its angular speed?

Answer in units of rad/s.

Through what angle does it rotate in 1.59 s?

Answer in units of rad.

1 Answer

Relevance
  • 6 days ago
    Favorite Answer

    This is an exercise in dimensional analysis.

    37.3 rev/min * 2π radians/rev * 1min/60s = ω = 74.6π/60 = 3.91 rad/s <<<<

    Use the rotational equivalent of d = Vo*t + ½at²

    Θ = ωo*t + ½*α*t² = 3.91*1.59 + ½*0*1.59² = 6.21 radians

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