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Q.12: A block of mass m, = 2-kg is located at the crigin in the XY plane. When t = 0, a second block of mass m; = 3 kg, initially located at the point (-3, 4) m starts moving with a constant velacity: T = (31 + 6j) m/s. The X-coordinate (in meters) of the center of mass of the two blocks when t = 2 sec, is: A. 0.5 В. 9.0 С. 1.8 D. 3.0 E. Zero

Q.12: A block of mass m, = 2-kg is located at the crigin in the XY plane. When t = 0, a second block of mass m; = 3 kg, initially located at the point (-3, 4) m starts moving with a constant velacity: T = (31 + 6j) m/s. The X-coordinate (in meters) of the center of mass of the two blocks when t = 2 sec, is: A. 0.5 В. 9.0 С. 1.8 D. 3.0 E. Zero

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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aAprt f ma moi COte k ne une the h en batt during tchatof eati t n hervative fottat uport when the particle mpletes anecle tietum hato starting point toe 50 ko o mehnsa energ, the wore n loules) done by he no ervative forte1ating on the partice during one cysle is A 25 C- 75 100 QK The adjaient figure hows a mast m -0e that it attached to a tampresied spring ( - *-with compresson dtance d-0!m The other end of the sping ia attacherd to alied wa "he sprinE constart 5000 N/m, the peed (un m/s) of the mass when the spring returns to its natural length (ie ng compression and no entension) is A 15 8 B 20 3 C 28.7 D 38.2 E. 98 Q.9: The potential energy function for a two dimensional force is given by U- (y-2y') aules. The magnitude of the conservative force that is responsible for such potential when calculated at the point (1, 2) m is: A 3.6 B 9.8 C. 15.3 D. 24.2 E. 50.7 Q. 10. True or depend on either the collision is elastic or inelastic". A. True "The law of conservation of total linear momentum of cclliding objects does not B. False Q.11: An object of mass m, = 2-kg moving to the right at 5 m/s strikes a stationary block (isits) in a completely inelastic collision. Due to the collision, 60% of the initial kinetic energy is converted to heat. The mass (in kg) of the stationary block is: A. 0.25 6. 1.0 C. 5.0 D. 9.8 Е. 3.0 Q.12: A block of mass m, = 2-kg is located at the crigin in the XY plane. When t = 0, a second block of mass m; = 3 kg, initially located at the point (-3, 4) m starts moving with a constant velocity: I. = (3i + 6j) m/s. The X-coordinate (in meters) of the center of mass of the two blocks when t = 2 sec, is: A. 0.5 B. 9.0 С. 1,8 D. 3.0 E. Zero Q.13: A disc of radius 0.25 m is initially rotating about an axis perpendicular to its plane and passing through its center at 0.5 rad/sec and is accelerating at 0.2 rad/s. The distance a point located at 10 cm from the center of the disc moves in 20 sec is: B. 5 m C. 9.8 m Q.14: A 2-kg particle moving horizontally with a speed of 5 m/s strikes (2) a vertical wall for 2 ms. It then rebounds () wvith the same speed. The magnitude of the average force (in kN) A. 2 m D. 12 m E. 25 m exerted on (k the particle by the wall is: А. 2 В. 5 С. 10 D. 20 E. Zero
Transcribed Image Text:aAprt f ma moi COte k ne une the h en batt during tchatof eati t n hervative fottat uport when the particle mpletes anecle tietum hato starting point toe 50 ko o mehnsa energ, the wore n loules) done by he no ervative forte1ating on the partice during one cysle is A 25 C- 75 100 QK The adjaient figure hows a mast m -0e that it attached to a tampresied spring ( - *-with compresson dtance d-0!m The other end of the sping ia attacherd to alied wa "he sprinE constart 5000 N/m, the peed (un m/s) of the mass when the spring returns to its natural length (ie ng compression and no entension) is A 15 8 B 20 3 C 28.7 D 38.2 E. 98 Q.9: The potential energy function for a two dimensional force is given by U- (y-2y') aules. The magnitude of the conservative force that is responsible for such potential when calculated at the point (1, 2) m is: A 3.6 B 9.8 C. 15.3 D. 24.2 E. 50.7 Q. 10. True or depend on either the collision is elastic or inelastic". A. True "The law of conservation of total linear momentum of cclliding objects does not B. False Q.11: An object of mass m, = 2-kg moving to the right at 5 m/s strikes a stationary block (isits) in a completely inelastic collision. Due to the collision, 60% of the initial kinetic energy is converted to heat. The mass (in kg) of the stationary block is: A. 0.25 6. 1.0 C. 5.0 D. 9.8 Е. 3.0 Q.12: A block of mass m, = 2-kg is located at the crigin in the XY plane. When t = 0, a second block of mass m; = 3 kg, initially located at the point (-3, 4) m starts moving with a constant velocity: I. = (3i + 6j) m/s. The X-coordinate (in meters) of the center of mass of the two blocks when t = 2 sec, is: A. 0.5 B. 9.0 С. 1,8 D. 3.0 E. Zero Q.13: A disc of radius 0.25 m is initially rotating about an axis perpendicular to its plane and passing through its center at 0.5 rad/sec and is accelerating at 0.2 rad/s. The distance a point located at 10 cm from the center of the disc moves in 20 sec is: B. 5 m C. 9.8 m Q.14: A 2-kg particle moving horizontally with a speed of 5 m/s strikes (2) a vertical wall for 2 ms. It then rebounds () wvith the same speed. The magnitude of the average force (in kN) A. 2 m D. 12 m E. 25 m exerted on (k the particle by the wall is: А. 2 В. 5 С. 10 D. 20 E. Zero
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