Ch 09: Momentum & ImpulseSee all chapters
All Chapters
Ch 01: Units & Vectors
Ch 02: 1D Motion (Kinematics)
Ch 03: 2D Motion (Projectile Motion)
Ch 04: Intro to Forces (Dynamics)
Ch 05: Friction, Inclines, Systems
Ch 06: Centripetal Forces & Gravitation
Ch 07: Work & Energy
Ch 08: Conservation of Energy
Ch 09: Momentum & Impulse
Ch 10: Rotational Kinematics
Ch 11: Rotational Inertia & Energy
Ch 12: Torque & Rotational Dynamics
Ch 13: Rotational Equilibrium
Ch 14: Angular Momentum
Ch 15: Periodic Motion (NEW)
Ch 15: Periodic Motion (Oscillations)
Ch 16: Waves & Sound
Ch 17: Fluid Mechanics
Ch 18: Heat and Temperature
Ch 19: Kinetic Theory of Ideal Gasses
Ch 20: The First Law of Thermodynamics
Ch 21: The Second Law of Thermodynamics
Ch 22: Electric Force & Field; Gauss' Law
Ch 23: Electric Potential
Ch 24: Capacitors & Dielectrics
Ch 25: Resistors & DC Circuits
Ch 26: Magnetic Fields and Forces
Ch 27: Sources of Magnetic Field
Ch 28: Induction and Inductance
Ch 29: Alternating Current
Ch 30: Electromagnetic Waves
Ch 31: Geometric Optics
Ch 32: Wave Optics
Ch 34: Special Relativity
Ch 35: Particle-Wave Duality
Ch 36: Atomic Structure
Ch 37: Nuclear Physics
Ch 38: Quantum Mechanics

Concept #1: Intro to Momentum

Example #1: Intro to Momentum

Practice: The horizontal and vertical components of a 3-kg object in space are 54 kg m/s and 72 kg m/s, respectively. Calculate the magnitude and direction of the object’s momentum.  

EXTRA: What is the object’s speed?

Additional Problems
Two bodies, A and B, have equal kinetic energies. The mass of A is nine times that of B. The ratio of the momentum of A to that of B is:A. 1:1B. 3:1 C. 1:3D. 1:9E. 9:1
You pull a block of mass m across across a frictionless table with a constant force. You also pull with an equal constant force a block of larger mass M. The blocks are initially at rest. If you pull the blocks through the same distance, which block has the greater kinetic energy, and which block has the greater momentum, respectively? 1. Same kinetic energy, same momentum 2. M, same momentum 3. M, M 4. Same kinetic energy, m 5. M, m 6. Same kinetic energy, M 7. m, m 8. m, same momentum 9. m, M
An ice skater whose mass is 50 kg moves with a constant momentum of (400, 0, 300) kg·m/s. During this period of constant momentum, she passes the location (0, 0, 3) m. What was her location at a time 3 s earlier? 1. (−8, 0, −5) m 2. (−24, 0, −15) m 3. (−10, 3, −7) m 4. (8, 0, 5) m 5. (10, 3, 7) m 6. (−20, 0, −14) m 7. (24, 0, 15) m
A planet with a mass of 1 × 1023 kg travels around a star in a nearly circular obrbit in the xy plane as shown in the diagram. Its speed is constant at 15000 m/s. Which arrow best describes the direction of ΔP in going from B to C? 1. g . 2. f 3. c 4. e 5. b 6. d 7. h 8. a
You drop an egg from rest with no air resistance. As it falls: A. Only its momentum is conserved, B. Only its kinetic energy is conserved. C. Both its momentum and its mechanical energy are conserved. D. Its mechanical energy is conserved, but its momentum is not conserved.