# 25. An 8.0-m massless rod is loosely pinned to a frictionless pivot at 0, as shown in the figure. Avery small 4.0-kg ball is attached to the other end of the rod. The ball is held at A, where the rodmakes a 30° angle above the horizontal, and is released. The ball-rod assembly then swingsfreely with negligible friction in a vertical circle between A and B.(a) Find the radial acceleration as the ball passes throughpoint D.(b) Find the tension in the rod when the ball passesthrough D. (Hint -what is T-mg in terms of theacceleration?).(c) Find the linear speed of the ball when it is at 30.1degrees (i.e. just before it reaches C.(d) Find the linear speed of the ball when it is at 29.9degrees (i.e. just before after it reaches C.(e) What is the tangential component of the acceleration ofthe ball as it passes C?4.0 kg8.0 m30°

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I need the solution for the question attached. Thanks

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Step 1

(c)

According to the law of conservation of energy, the linear speed of the ball is,

Substitute the values,

Step 2

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