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sean
sean asked in Science & MathematicsPhysics · 4 months ago

Physics Rotational problem?

A torque of 49.4 N · m is applied to a grinding wheel (I = 18.2 kg · m^2) for 26 s. 

a) If it starts from rest, what is the angular velocity (in rad/s) of the grinding wheel after the torque is removed? (Enter the magnitude.)

b) Through what angle (in radians) does the wheel move through while the torque is applied?

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  • ?
    Lv 7
    4 months ago
    Favorite Answer

    α = τ/I = 49.4/18.2 = 2.71 rad/s²

    a) ω = αt = 2.71(26) = 70.57... ≈ 70.6 rad/s

    b) θ = ½αt² = ½(2.71)26² = 917.428... ≈ 917 radians

    Please remember to select a Favorite Answer from among your results.

  • ?
    Lv 7
    4 months ago

    Here's a comparsison to standard kinematics:

    Attachment image
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