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(b) The 11.5 kg slender rod pivoted about point O is pressed against a spring at point A, in which the spring (k = 375 kN/m) is compressed by 27 mm, as shown in Figure Q2(b). At this instance, the rod is at horizontal position and is stationary. If the rod is released from this position, By using the principle of conservation of energy, explain with calculations on how changing the mass of the rod would influence the downward reaction of the pivot when the rod passes through a vertical position. (ii) From your working in Q2(b(i), explain two possible ways to increase the angular velocity of the rod when the rod passes through a vertical position.

(b) The 11.5 kg slender rod pivoted about point O is pressed against a spring at point A, in which the spring (k = 375 kN/m) is compressed by 27 mm, as shown in Figure Q2(b). At this instance, the rod is at horizontal position and is stationary. If the rod is released from this position, By using the principle of conservation of energy, explain with calculations on how changing the mass of the rod would influence the downward reaction of the pivot when the rod passes through a vertical position. (ii) From your working in Q2(b(i), explain two possible ways to increase the angular velocity of the rod when the rod passes through a vertical position.

University Physics Volume 1
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter1: Units And Measurement
Section: Chapter Questions
Problem 32P: A car is traveling at a speed of 33 m/s. (a) What is its speed in kilometers per hour? (b) Is it...
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The second image is related to  question Q2b

Al kg ball initially travelling at 7 m/s strikes on the lower end of a 5 kg bar AB, as shown in Figure Q2(a). The bar is hinged at A and is initially at rest. The cocfficient of restitution between the rod and sphere is 0.7. Q2. (a) (i) Determine the angular velocity of the bar and the velocity of the ball immediately after impact. (ii) From your working in Q2(a)(), explain how the ball and rod masses can influence the angular velocity of the bar and the velocity of the ball immediately after impact. L/2 L-800 mm 7 m/s B Figure Q2(a) (b) The 11.5 kg slender rod pivoted about point O is pressed against a spring at point 4, in which the spring (k = 375 kN/m) is compressed by 27 mm, as shown in Figure Q2(b). At this instance, the rod is at horizontal position and is stationary. If the rod is released from this position, 6) By using the principle of conservation of energy, explain with calculations on how changing the mass of the rod would influence the downward reaction of the pivot when the rod passes through a vertical position. (ii) From your working in Q2(bXi), explain two possible ways to increase the angular velocity of the rod when the rod passes through a vertical position.
Transcribed Image Text:Al kg ball initially travelling at 7 m/s strikes on the lower end of a 5 kg bar AB, as shown in Figure Q2(a). The bar is hinged at A and is initially at rest. The cocfficient of restitution between the rod and sphere is 0.7. Q2. (a) (i) Determine the angular velocity of the bar and the velocity of the ball immediately after impact. (ii) From your working in Q2(a)(), explain how the ball and rod masses can influence the angular velocity of the bar and the velocity of the ball immediately after impact. L/2 L-800 mm 7 m/s B Figure Q2(a) (b) The 11.5 kg slender rod pivoted about point O is pressed against a spring at point 4, in which the spring (k = 375 kN/m) is compressed by 27 mm, as shown in Figure Q2(b). At this instance, the rod is at horizontal position and is stationary. If the rod is released from this position, 6) By using the principle of conservation of energy, explain with calculations on how changing the mass of the rod would influence the downward reaction of the pivot when the rod passes through a vertical position. (ii) From your working in Q2(bXi), explain two possible ways to increase the angular velocity of the rod when the rod passes through a vertical position.
02 (b). (Continued) 1.75 m 0.65 m A B Figure Q2(b)
Transcribed Image Text:02 (b). (Continued) 1.75 m 0.65 m A B Figure Q2(b)
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