Domanda del libro di testo
A particle starts from x0 = 10 m at t0 = 0 s and moves with the velocity graph shown in FIGURE EX2.6. What is the object’s position at t = 2 s and 4 s?
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Ch 02: Kinematics in One Dimension
Knight Calc5th EditionPhysics for Scientists and EngineersISBN: 9780137344796
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TOC.tableOfContents
- Ch 01: Concepts of Motion35
- Ch 02: Kinematics in One Dimension75
- Ch 03: Vectors and Coordinate Systems58
- Ch 04: Kinematics in Two Dimensions60
- Ch 05: Force and Motion23
- Ch 06: Dynamics I: Motion Along a Line53
- Ch 07: Newton's Third Law27
- Ch 08: Dynamics II: Motion in a Plane52
- Ch 09: Work and Kinetic Energy56
- Ch 10: Interactions and Potential Energy50
- Ch 11: Impulse and Momentum56
- Ch 12: Rotation of a Rigid Body71
- Ch 13: Newton's Theory of Gravity52
- Ch 14: Fluids and Elasticity44
- Ch 15: Oscillations55
- Ch 16: Traveling Waves37
- Ch 17: Superposition39
- Ch 18: A Macroscopic Description of Matter53
- Ch 19: Work, Heat, and the First Law of Thermodynamics60
- Ch 20: The Micro/Macro Connection53
- Ch 21: Heat Engines and Refrigerators34
- Ch 22: Electric Charges and Forces40
- Ch 23: The Electric Field39
- Ch 24: Gauss' Law32
- Ch 25: The Electric Potential63
- Ch 26: Potential and Field57
- Ch 27: Current and Resistance42
- Ch 28: Fundamentals of Circuits39
- Ch 29: The Magnetic Field47
- Ch 30: Electromagnetic Induction60
- Ch 31: Electromagnetic Fields and Waves32
- Ch 32: AC Circuits63
- Ch 33: Wave Optics32
- Ch 34: Ray Optics57
- Ch 35: Optical Instruments30
- Ch 36: Special Relativity38
- Ch 37: The Foundations of Modern Physics25
- Ch 38: Quantization49
- Ch 39: Wave Functions and Uncertainty31
- Ch 40: One-Dimensional Quantum Mechanics35
- Ch 41: Atomic Physics18
- Ch 42: Nuclear Physics27
Knight Calc5th EditionPhysics for Scientists and EngineersISBN: 9780137344796Non è quello che usi tu?Cambia libro di testo
Capitolo 2, Problema 6a
A particle starts from at and moves with the velocity graph shown in FIGURE EX2.6. Does this particle have a turning point? If so, at what time?
Guida verificata passo dopo passo1
Step 1: Understand the concept of a turning point. A turning point occurs when the velocity of the particle changes direction, i.e., when the velocity becomes zero and then reverses its sign.
Step 2: Analyze the velocity graph provided. The graph shows the velocity of the particle as a function of time. The velocity starts at 0 m/s, increases to 20 m/s, remains constant, and then decreases back to 0 m/s before becoming negative.
Step 3: Identify the time at which the velocity becomes zero after being positive. From the graph, the velocity decreases linearly and reaches 0 m/s at t = 10 seconds.
Step 4: Check if the velocity becomes negative after t = 10 seconds. The graph shows that the velocity becomes negative after t = 10 seconds, indicating a change in direction.
Step 5: Conclude that the particle has a turning point at t = 10 seconds, as this is the time when the velocity transitions from positive to zero and then to negative.
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Velocity and Turning Points
In physics, a turning point occurs when a particle changes its direction of motion. This is typically indicated by a change in the sign of the velocity. In a velocity-time graph, a turning point is where the velocity crosses the time axis, indicating that the particle has stopped and is about to move in the opposite direction.
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08:35
Angular Momentum of a Point Mass
Velocity-Time Graph Interpretation
A velocity-time graph visually represents an object's velocity over time. The slope of the graph indicates acceleration, while the area under the curve represents displacement. In this case, the graph shows a constant velocity followed by a decrease, which suggests that the particle is moving at a steady speed before slowing down, potentially indicating a turning point.
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05:59Velocity-Time Graphs & Acceleration
Constant Velocity
Constant velocity means that an object is moving at a uniform speed in a straight line, with no acceleration. In the provided graph, the particle maintains a velocity of 20 m/s for a period before decreasing. This constant velocity phase indicates that the particle is not experiencing any net forces acting on it, allowing it to move steadily until it begins to decelerate.
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08:59Phase Constant of a Wave Function
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Domanda del libro di testo
FIGURE EX2.5 shows the position graph of a particle. Draw the particle’s velocity graph for the interval .
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FIGURE EX2.8 is a somewhat idealized graph of the velocity of blood in the ascending aorta during one beat of the heart. Approximately how far, in cm, does the blood move during one beat?
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FIGURE EX2.9 shows the velocity graph of a particle. Draw the particle's acceleration graph for the interval 0 s ≤ t ≤ 4 s.
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FIGURE EX2.4 is the position-versus-time graph of a bicycle. What is the bicycle's velocity at t = 5s
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FIGURE EX2.4 is the position-versus-time graph of a bicycle. What is the bicycle's velocity at t = 30s?
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