A 25-mm-diameter uniform steel shaft is 600 mm long between bearings. (7-33) (9 Pts) A. Find the lowest critical speed of the sh
aft. B. If the goal is to double the critical speed, find the new diameter. C. A half-size model of the original shaft has what critical speed?
1 answer:
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Period = 6 seconds and .
<u>Explanation:</u>
We have , the motion of a swing that requires 6 seconds to complete one cycle. Period is the amount of time needed to complete one oscillation . And in question it's given that 6 seconds is needed to complete one cycle. Hence ,Period of the motion of a swing is 6 seconds . Frequency is the number of vibrations produced per second and is calculated with the formula of . SI unit of frequency is Hertz or Hz. We know that time period is 6 seconds so frequency =
⇒
⇒
⇒
Therefore , Period = 6 seconds and .
Answer with Explanation:
We are given that
Constant speed of Jane=12.6 m/s
a.When Fred can throw the ball 30 m/s
We have to find the angle relative to the horizontal when he throw the ball in order for Sue to see the ball travel vertically upward.
Let be the angle .
Therefore,
b.We have to find the height to which ball reach.