Four equal masses MMM are spaced at equal intervals, ℓℓ, along a horizontal straight rod whose mass can be ignored. The system is to be rotated about a vertical axis passing through the mass at the left end of the rod and perpendicular to it. Part A What is the moment of inertia of the system about this axis? Express your answer in terms of the variables MMM and lll. II = 3Ml2 SubmitPrevious AnswersRequest Answer Incorrect; Try Again; 5 attempts remaining Your answer either contains an incorrect numerical multiplier or is missing one. Part B What minimum force, applied to the farthest mass, will impart an angular acceleration αα? Express your answer in terms of the variables MMM, lll, and ααalpha. FminFmin = nothing SubmitRequest Answer Part C What is the direction of this force? What is the direction of this force? The force is perpendicular to the rod and the axis of rotation. The force is perpendicular to the rod and parallel to the axis of rotation. The force is parallel to the rod and the axis of rotation.

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Angular speed, acceleration and displacement

Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.

Angular Position

Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.