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Matter & Interactions 2nd ed. Practice Problems	Aaron Titus \| High Point University
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I. Modern Mechanics (89)

1 Interactions and Motion (21)

2 The Momentum Principle: Impulse and Momentum Change (18)

2.1 System and surroundings (1)

2.2 The Momentum Principle (5)

2.3 Applying the Momentum Principle (3)

2.4 Updating position if momentum is changing (2)

2.5 Predicting motion: Constant force (2)

2.6 Problems of greater complexity (2)

2.7 Physical models (0)

2.8 Systems consisting of several objects (0)

2.9 Collisions: Negligible external forces (1)

2.10 Conservation of momentum (2)

2.11 *Derivation: Special case average velocity (0)

2.12 *Inertial frames (0)

2.13 *Velocity and momentum at high speeds (0)

2.14 *Measurements and units (0)

3 The Momentum Principle: Non-constant Forces (7)

4 Contact Forces and the Momentum Principle (14)

5 The Energy Principle (11)

6 Energy in Macroscopic Systems (5)

7 Energy Quantization (2)

8 Multiparticle Systems (3)

9 Collisions (2)

10 Angular Momentum (6)

11 Entropy: Limits on the Possible (0)

12 Gases and Engines (0)

1220004 Change in momentum of Earth in 1 day during its orbit around Sun 1220004
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Question

Earth orbits Sun in a nearly circular orbit with a speed m/s. Suppose that at a certain instant, Earth's velocity is in the –x direction. At this instant, the force by Sun on Earth is . What will be Earth's momentum 1 day later? During this time interval, the only significant force acting on Earth is the gravitational force by Sun on Earth. Figure: The gravitational force by Sun on Earth.