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Ch 01: Concepts of Motion
Chapter 1, Problem 1

A bowling ball rolls up an incline and then onto a smooth, level surface. Draw a complete motion diagram of the bowling ball. Don't try to find the acceleration vector at the point where the motion changes direction; that's an issue for Chapter 4.

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1
Identify the different segments of the motion: The bowling ball initially moves up an incline and then transitions onto a smooth, level surface.
Draw the path of the bowling ball: Start with an upward sloping line representing the incline, then continue with a horizontal line representing the smooth, level surface.
Mark the position of the bowling ball at regular intervals along the path to indicate its motion over time. These marks should be closer together on the incline where the ball is slowing down due to gravity and further apart on the level surface where the ball moves at a constant speed.
At each marked position, draw a velocity vector. The vectors should decrease in length as the ball moves up the incline, indicating deceleration. On the level surface, the vectors should be of equal length, indicating constant speed.
Indicate the transition point where the ball moves from the incline to the level surface. Note that the direction of the velocity vector changes here, but avoid calculating the acceleration vector at this point as per the problem's instruction.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Motion Diagrams

A motion diagram visually represents the position of an object at successive time intervals. Each point on the diagram indicates the object's location at a specific moment, allowing for the analysis of its motion. In this case, the bowling ball's transition from rolling up an incline to moving on a level surface can be illustrated to show changes in position and direction.
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Inclined Plane Dynamics

An inclined plane is a flat surface tilted at an angle to the horizontal, affecting the motion of objects on it. When a bowling ball rolls up an incline, gravitational forces and friction influence its acceleration and velocity. Understanding how these forces interact is crucial for analyzing the ball's motion as it ascends and subsequently descends the incline.
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Kinematics

Kinematics is the branch of physics that describes the motion of objects without considering the forces that cause the motion. It involves concepts such as displacement, velocity, and acceleration. In the context of the bowling ball, kinematic equations can help describe its motion as it rolls up the incline and transitions to a smooth surface, although the question specifies not to calculate acceleration at the direction change.
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Related Practice
Textbook Question
A jet plane lands on the deck of an aircraft carrier and quickly comes to a halt. Draw a basic motion diagram, using the s from the video, from the time the jet touches down until it stops.
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You drop a soccer ball from your third-story balcony. Use the particle model to draw a motion diagram showing the ball's position and average velocity vectors from the time you release the ball until the instant it touches the ground.
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A speed skater accelerates from rest and then keeps skating at a constant speed. Draw a complete motion diagram of the skater.
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Your roommate drops a tennis ball from a third-story balcony. It hits the sidewalk and bounces as high as the second story. Draw a complete motion diagram of the tennis ball from the time it is released until it reaches the maximum height on its bounce. Be sure to determine and show the acceleration at the lowest point.
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Textbook Question
For Problems 34, 35, 36, 37, 38, 39, 40, 41, 42, and 43, draw a complete pictorial representation. Do not solve these problems or do any mathematics. A car starts from rest at a stop sign. It accelerates at 4.0 m/s² for 6.0 s, coasts for 2.0 s, and then slows at a rate of 2.5 m/s² for the next stop sign. How far apart are the stop signs?
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Textbook Question
Problems 44, 45, 46, 47, and 48 show a motion diagram. For each of these problems, write a one or two sentence 'story' about a real object that has this motion diagram. Your stories should talk about people or objects by name and say what they are doing.

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