Four particles, each of mass,0.20 kg, are placed at the vertices of asquare with sides of length 0.50 m.Theparticles are connected by rods of negligiblemass. This rigid body can rotatein a vertical plane about a horizontalaxis A that passes through one of theparticles. The body is released fromrest with rod AB horizontal .(a) What is the rotational inertia of thebody about axis A? (b) What is the angularspeed of the body about axis Awhen rod AB swings through the verticalposition?
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.
Four particles, each of mass,
0.20 kg, are placed at the vertices of a
square with sides of length 0.50 m.The
particles are connected by rods of negligible
mass. This rigid body can rotate
in a vertical plane about a horizontal
axis A that passes through one of the
particles. The body is released from
rest with rod AB horizontal .
(a) What is the rotational inertia of the
body about axis A? (b) What is the angular
speed of the body about axis A
when rod AB swings through the vertical
position?
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