College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- 5. Two balls, A and B, each of mass 1.0 kg, initially travel at the velocities VA = (10î + 20ĵ ) m/s and Vg = (-10î + 5j ) m/s, respectively. Immediately after their collision V = (-3î + 15j ) m/s. No net external force acts on the two balls. %3D What is the final velocity of ball A? What is the change in the balls' total kinetic energy?arrow_forwardProblem 2. The law of conservation of momentum applies to a collision between two bodies since a) They exert equal and opposite forces on each other. b) They exert forces on each other respectively proportional to their masses. c) They exert forces on each other respectively proportional to their velocities. d) They exert forces on each other respectively inversely proportional to their masses. e) Their accelerations are proportional to their masses.arrow_forward19arrow_forward
- Help mearrow_forwardTwo billiard balls collide in an elastic collision. Which statement about total energy and momentumof the two balls is true?a) both the energy and momentum of the system are conservedb) neither the energy nor momentum of the system are conservedc) the energy of the system is conserved, but the momentum is notd) the momentum of the system is conserved, but the energy is notarrow_forwardTable 1a: Elastic Collisions and Change in Momentum Trial vf (m/s) vi (m/s) Dv (m/s) Dp (kg•m/s) cart 0.89 -0.97 1.86 0.5022 cart with one mass 0.65 -0.80 1.45 0.754 cart with two masses 0.51 -0.63 1.14 0.878 Table 1b: Elastic Collisions and Impulse Trial I (N•s) cart 0.632 cart with one mass 0.959 cart with two masses 1.066 Table 1c: Elastic Collisions and Impulse Trial % difference between I and Dp (I -Dp)/ ((Dp+ I)/2) * 100 cart 22.89 % cart with one mass 23.93 % cart with two masses 19.34 % Q1. What can you conclude about Table 1c (Impulse I and change in Momentum Dp) for Elastic Collisions?arrow_forward
- Under which of these conditions can you conclude with certainty that the total momentum before a collision is the same as after the collision.arrow_forwardTwo cars have the same mass. Car 1 is travelling northward at a speed of 45 mi/hr. Car 2 is travelling southward at a speed of 45 mi/hr. The cars a) have the same momentum and kinetic energy. b) have the same momentum but different kinetic energies. c) have different momenta but the same kinetic energy. d) Have different momenta and kinetic energy.arrow_forwardIn this perfectly inelastic collision the carts are moving on a frictionless surface. Cart A has a momentum of 24 kg-m/s [West]. Cart B has a momentum 10 kg-m/s. [South] What is the magnitude of their combined momentum after the collision? a) cannot be determined without knowing masses and velocities b) 34 kg-m/s c) 26 kg-m/s d) 14 kg-m/s e) 240 kg-m/sarrow_forward
- For a system of three particles moving along a line, an observer in a laboratory measures the following masses and velocities. What is the velocity of the CM of the system? Enter a positive value if the velocity of the CM of the system is in the +x direction and enter a negative value if the velocity of the CM of the system is in the -x direction. Mass (kg) Vx (m/s) 4.00 230 5.0 -120 2.0 +52 m/sarrow_forwardProblem B) An inelastic collision occurs between a particle of mass 1.5 kg moving with an initial velocity of v = (-2i – 1.33 + 0.7k) m/s and another particle of mass 0.8 kg that has an initial velocity of v = (5.6å + 0.53 + 4.3k) m/s. What is the final velocity of the particles in unit vector notation? %3Darrow_forward5. Consider the two-dimensional collision between two objects, A and B, shown in the picture below. Before A VA B After A B MB=0.8 kg VA=5 m/s VB=0 m/s VAf = 3 m/s VAF eA B VBF MA=0.6 kg a.) Use the momentum principle to find 0B and VBF. b.) Is this collision elastic or inelastic? Verify your answer by computing AE sys- 0A=30°arrow_forward
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