Rotational Motion & Angular Displacement
Torque
1
What symbol is used to represent angular velocity in rotational motion, and what is the formula for angular velocity?
W(omega) = ϴ / t
2
Find the average angular velocity of a rotating body which makes 10 revolutions in 20 seconds.
3.1416 radians/s
2
A rotating body changes in angular velocity from 1,000 rad/s to 2,000 rad/s in 20s. What is its angular acceleration during that period?
50 rad/s^2
2
What symbol is used to represent angular acceleration in rotational motion, and what is the formula for angular acceleration?
3
If an object undergoes an angular displacement of 4π radians, how many revolutions does it complete?
Number of Revolutions=4π/2π
Therefore, the object completes 2 revolutions when undergoing an angular displacement of 4π radians.
3
A person is trying to open a heavy door by pushing near the hinge and then pushing near the doorknob. How does the torque applied to the door differ in each case, and what impact does the distance from the point of force application to the hinge have on the door's rotation? Explain the physics of torque in this practical scenario.
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