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Physics Review - answers Accelerated motion, free-fall, and the Law of Inertia
What does the slope of a line on a position vs. time graph mean? velocity
What does the slope of a line on a velocity vs. time graph mean? acceleration
What does the area under the line on a velocity vs. time graph mean? displacement
In the first unit of time the bb falls 1 cm as shown. What is the position of the bb after 3 units of time? 9 cm
A ball is dropped from rest as shown in the figure. What is the speedometer reading at 3 seconds? 30 m/s
Joe’s reaction time was 0.12 seconds. He is driving at 20 m/s and sees an obstacle in the road. How far will he move before he can apply the brakes? 2.4 m
What happens to an unbuckled Kermie when his cart hits a wall? He continues to move forward and hits the wall
An object is thrown straight upward with a velocity of +50 m/s. At what time will it reach its highest point? t = 5 s
An object is thrown straight upward with a velocity of +20 m/s. What is its velocity at its highest point? 0
Carts were released from rest along two different inclines. Which car was on the steeper incline? Cart A Cart B position time Cart A
Carts were released from rest along two different inclines. Which cart was on the shallower incline? velocity time Cart C Cart D
Describe the motion of this car Time (s) Position (m) y = 20x + 0 Moving at a constant velocity of 20 m/s
A ball is dropped from rest as shown in the diagram. What is the speedometer reading at 5 seconds? 50 m/s
Which color car is moving faster? X(m) Time (s) red
What is happening at the point where the two lines cross? X(m) Time (s) Same place at same time
Describe the motion of these two cars X(m) Time (s) Blue – constant speed Red - accelerating
Do these two cars ever have the same velocity? v(m/s) Time (s) yes
A plane traveling toward the left wants to drop a package on the X. At what point must the plane drop the package? C
Describe the a-t graph that matches this motion v(m/s) Time (s) 0 Flat line above 0
Describe the a-t graph that matches this motion v(m/s) Time (s) 0 Flat line below 0
An object is thrown straight upward with a velocity of +50 m/s. What is its acceleration at the highest point? -10 m/s 2
A marble and a bowling ball are dropped from a tower. Ignoring air resistance, which strikes the ground first? Both strike same time
Describe the motion of this object t = 0 X = 0 X = 1 m X = 4 m X = 9 m acceleration
What is the displacement of this object for the first 3 s? 15 m
What is the average velocity for the first 3 s? 5 m/s
Determine the displacement for the first 3 s. 9 m
Determine the instantaneous velocity at t = 2 s. 2 m/s
What is the acceleration of this object? - 2 m/s 2
A rock is dropped from a bridge and it takes 3 seconds to hit the water. How high is the bridge above the water? Ignore air resistance. 45 m
Describe the motion of this object t = 0 X = 0 X = 1 m X = 4 m X = 9 m Constant speed
What is the object’s velocity at t = 7 s? Time (sec) Velocity (m/s) 30 m/s
What is the object’s acceleration at t = 18 s? Time (sec) Velocity (m/s) 12.5 m/s 2
What is the object’s displacement between t = 5 and t = 9 s? Time (sec) Velocity (m/s) 120 m
Where is the object at t = 20 s? Time (sec) position (m) 10 m
An object is thrown straight upward with a velocity of +40 m/s. At what time will it reach its highest point? 4 s
What is the difference between speed and velocity? Speed is how fast; velocity is speed and direction
Example of an accelerating object that has constant speed Object moving in a circular path
What is the velocity of an object 7 seconds after being thrown upward with an initial velocity of +50 m/s upward? -20 m/s
Who was the person who first published a book that suggested the Earth moves around the Sun? Copernicus
What is the usual reason that an object sliding along a flat surface stops? friction
An object in motion will continue moving at a constant speed in a straight line UNLESS ________ An unbalanced force acts
A ball is whirled around in a circle on a string. The string breaks when the ball is at the point shown below. Which letter best describes the path of the ball after the string breaks? b
Motion in One Dimension – PART (s) x (m) 1234 t 5 Motion Diagrams An object starts from rest and moves with constant.
Kinematics Kinematics is the branch of mechanics that describes the motion of objects without necessarily discussing what causes the motion. We will learn.
© 2010 Pearson Education, Inc. Motion Is Relative Displacement vs. Distance Velocity vs. Speed Velocity: Average and Instantaneous Acceleration Free Fall.
Kinematic Equations Practice Problems. 1. An object starts from rest with a constant acceleration of 8.00 m/s/s along a straight line. Find the speed.
CHAPTER 2 FORCES AND MOTION. THINK ABOUT IT…. If Wile E. Coyote and a boulder fall off a cliff at the same time, which do you think will hit the ground.
Ch. 2 Conceptual Practice AP Physics B 21 questions…have phun. Answers are provided after the quiz (slides 24-44).
A science class takes a toy cart and rolls it down an incline. They measure the distance the cart travels. The investigation is repeated changing the.
Chapter 4. Motion An object’s change in position relative to a reference point When an object changes position with respect to a frame of reference,
Motion Chapter 11. Standards Students will: SPS8. Determine the relationship between force, mass and motion SPS8a Calculate velocity and acceleration.
Chapter 4. Motion An objects change in position relative to a reference point When an object changes position with respect to a frame of reference,
Distance: describes how far an object has moved, regardless of its direction ex: 40km east + 25km west = 65 total km traveled Displacement: describes.
Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 2 Table of Contents Section 1 Displacement and Velocity Section.
4 Linear Motion You can describe the motion of an object by its position, speed, direction, and acceleration.
The Length of a Straight Line Path Between Two Points is the.. a. Speed b. Area c. Distance d. Volume.
Figure 3-10 Horizontal projection. Figure 3-11 Projection at an angle.
© 2005 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching their.
Info First Exam Thursday Oct. 2 Chapters 1, 2, and 3 homework due at that time. 3inch x 5 inch card is okay to use 1-side of equations, no sentences 1st.
Shuey/Wolfe. How is motion measured? What is a force? How does friction affect motion? How does gravity affect objects?
Newtons First Law of Motion unit 6.3 year 10. Context Forces act on us every day, causing many different effects. In 1687, Isaac Newton asked how these.
Chapter 2.3 & 3 Force, Mass and Acceleration Newton’s Laws.
Motion in One DimensionSection 1 Preview Section 1 AccelerationAcceleration Section 2 Extra QuestionsExtra Questions.
Mechanics Rotation, Angular Momentum and Gravity.
FORCE & MOTION REVIEW. Question 1 A large bus travels city streets. It takes the bus 10 seconds to cross each city block. If all the city blocks are the.
Motion in One Dimension. Dynamics The branch of physics involving the motion of an object and the relationship between that motion and other physics concepts.
Kinematics The branch of mechanics that studies the motion of a body without caring about what caused the motion.
Freefall Motion Notes Any object near the surface of the Earth experiences the pull of gravity. If released from rest, the object will fall freely toward.
CHAPTER 2 NOTES GRAVITY AND NEWTONS LAWS OF MOTION.
1. An object in motion tends to stay in motion and an object at rest tends to stay at rest unless acted upon by an unbalanced force. 2. Force equals.
Kinematics in One Dimension Chapter 2. Kinematics deals with the concepts that are needed to describe motion. Dynamics deals with the effect that forces.
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