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Question1
Consider a thin rod of mass 1.4 kg, length 2.7 m and uniform density. The rod is pivoted at one end on a frictionless horizontal pin. The rod is at first held in horizontal position however eventually allowed to swing down. What is its angular acceleration at instant it makes an angle 68 ? with the horizontal? The acceleration because of gravity is 9.8 m/s 2. Answer in units of rad/s 2
Question2
A ball is thrown toward a cliff of height (h) with a speed of 30m/s and an angle of 60 degrees above horizontal. It lands on the edge of the cliff 4.0s later.
a) How high is the cliff?
b) What was an utmost height of the ball?
c) What is ball's impact speed?
Question3
When a guitar string is sounded along with a 436 Hz tuning fork, a beat frequency of 5.00 Hz is heard. While the same string is sounded along with a 434 Hz tuning fork, the beat frequency is 7.00 Hz. What is frequency of the string?
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