A. 0.01 Hz
B. 0.04 Hz
C. 2.27 Hz
D. 3.60 Hz
Correct Answer:
Option D – 3.60 Hz
Explanation
Frequency = (No. of revolutions)/ Time = (90)/25 = 3.6 Hz
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![A screw jack with a Tommy bar of length 12cm is used to raise a car through a vertical height of 25cm by turning the Tommy bar through 50 revolutions. Calculate the approximate velocity ratio of the jack [π=3.142]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A screw jack with a Tommy bar of length 12cm is used to raise a car through a vertical height of 25cm by turning the Tommy bar through 50 revolutions. Calculate the approximate velocity ratio of the jack [π=3.142]")