Point A of the circular disk is at the angular position 0 = 0 at time t = 0. The disk has angular velocity wo = 0.29 rad/s at t = 0 and subsequently experiences an angular acceleration a = 1.8t where t is in seconds, and a is in radians per second squared. Determine the velocity and acceleration of point A in terms of fixed i and j unit vectors at time t = 2.7 s. Assumer = 145 mm. α Answers: VA = aд = 90 (i ( i 0 6.806 i + i + i i 1 0.705 j) m/s j) m/s2

Mass=1/12M

An engine flywheel initially rotates counterclockwise at 6.83 rotations/s. Then, during 25.1 s, its rotation rate changes to 2.19 rotations/s clockwise. Find the flywheel's average angular acceleration (including its sign) in radians per second squared. Define counterclockwise rotation as positive. what is the average angular acceleration?

Please answer the following question(s): 1. A helicopter blade spins at exactly 130 revolutions per minute. Its tip is 5.00 m from the center of rotation. Hint: What is the shape of the path described by the helicopter blade? How do you find the length of this path? (a) What is the total distance traveled by the tip per minute? Enter to 3 significant figures Distance: m (b) What is the average speed of the tip of the blade? Enter to 3 significant figures Average speed: m/s (c) What is the average velocity over one revolution? Enter to 3 significant figures Average velocity: m/s

The center O of the wheel is mounted on the sliding block, which has an acceleration ao = 7.1 m/s2 to the right. At the instant when 0 = 39°, 0 = 3.3 rad/s and 0 = -6.7 rad/s2. For this instant determine the magnitudes of the accelerations of points A and B. 8 Answers: aA = ав A i i 340. mm B ao m/s2 m/s2

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the speed and centripetal acceleration of a person situated (a) at the equator and (b) at a latitude of 57.0 ° north of the equator. Re (а) v %3 Units ac Units (а) v 3D Units ac Units II II

Pls help ASAP

An electric motor rotating a workshop grinding wheel at a rate of 151rev/min is switched off. Assume constant angular deceleration of magnitude 2.93 rad/s2. Through how many revolutions does the wheel turn before it finally comes to rest?

A helicopter propeller blade starts from rest and experiences a constant angular acceleration of 25.0 rad/s2. Find the speed of a point on the blade 2.70 m from the axis of rotation when the blade has completed 20 revolutions

A particle is moving in a curved path with a constant angular velocity of 2 rads-1. Which of the following is the correct magnitude of its normal (i.e. radial) acceleration when the radius of curvature is 5 m?

The rod O A rotates clockwise with a constant angular velocity of 6 rad/s. Two pin- connected slider blocks, located at B, move freely on OA and the curved rod whose shape is a limacon described by the equation r = 200(2 - cos ) mm. (Figure 1) Figure B 600 mm 6 rad/s 400 mm 200 mm 1 of 1 Part A Determine the speed of the slider blocks at the instant 0 = 145°. Express your answer to three significant figures and include the appropriate units. V = Value Submit μA Provide Feedback Request Answer Units ? Next>

At some instant, a particle is traveling in a horizontal circular path of radius 6.6m, has a total acceleration with a magnitude of 19m/s^2 and a constant tangential acceleration of 12m/s^2. Determine the speed of the particle at this instant 1/8 of a revolution later.

Deduce an expression for a rotation operation along z-axis R2(a)= exp. La ħ