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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? 0 30 60 012345678910101 1212 1313 1414 1515 1616 1717 1818 1919 2020 Time (sec) Velocity (m/s) 30 m/s
What is the object’s acceleration at t = 18 s? 0 30 60 012345678910101 1212 1313 1414 1515 1616 1717 1818 1919 2020 Time (sec) Velocity (m/s) 12.5 m/s 2
What is the object’s displacement between t = 5 and t = 9 s? 0 30 60 012345678910101 1212 1313 1414 1515 1616 1717 1818 1919 2020 Time (sec) Velocity (m/s) 120 m
Where is the object at t = 20 s? 0 30 60 012345678910101 1212 1313 1414 1515 1616 1717 1818 1919 2020 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
Physics 151 Week 5 Day 2 Topics –Motion with constant acceleration –Motion Diagrams –Motion Graphs –Area under a curve –Acceleration to velocity –Velocity.
Does the odometer of a car measure distance traveled or displacement? 1.Distance traveled 2.displacement 3.neither 4.both.
I.A.1 – Kinematics: Motion in One Dimension. Average velocity, constant acceleration and the “Big Four”
Physics 151 Week 5 Day 1 Topics Area under a velocity graph
You are going 25 m/s North on I-35. You see a cop parked on the side of the road. What is his velocity related to you. A.25 m/s South B.25 m/s North C.0.
Chapter 2 Motion in One Dimension 1. Speed 2. Displacement 3. Average and Instantaneous velocity 4. Acceleration 5. Motion Diagrams 6. 1D motion with constant.
Review of Momentum and Forces. What is the mass of a 10 kg rock on the Earth?
Physics 151 Week 4 Day 2 Topics –Motion Graphs –Area under a curve (velocity to position) –Constant acceleration equations.
Chapter 2 Motion Along a Line. Position & Displacement Speed & Velocity Acceleration Describing motion in 1D Free Fall.
Unit Review FORCE & MOTION. 1. EXPLAIN HOW A PARACHUTE SLOWS THE RATE OF A SKYDIVERS FALL. The use of friction of air being caught by the chute…called.
PHYS 201 Chapter 2: Kinematics in 1-D Distance Displacement Speed
Acceleration How quickly velocity changes.. Acceleration TIME0.00 s1.00 s2.00 s3.00 s4.00 s VELOCITY0 m/h10 m/h20 m/h30 m/h40 m/h This table is for acceleration.
NEWTON’S 3 LAWS OF MOTION 12.2 & SCIENTISTS HAVE CONTRIBUTED TO OUR UNDERSTANDING OF FORCE & MOTION ARISTOTLE: AN ANCIENT GREEK SCIENTIST AND.
Acceleration. 5.The motion of a particle along a straight line is depicted in this graph. Assessment V (m/s) t (s) What is the acceleration of the particle.
A parachutist jumps out of an airplane and accelerates with gravity to a maximum velocity of 58.8 m/s in 6 seconds. He then pulls the parachute cord and.
Physics 1100 – Spring 2012 Inertia, Forces and Acceleration: The Legacy of Sir Isaac Newton Objects in Motion.
Physical Science Take 10 Week # 3.
a) The kinetic energy of the car. b) The distance it takes to stop.
Chapter 2 Motion. Think About It! How would you describe speed? How would you describe speed? What would you need to know to figure out speed? What would.
Free Fall Chapter 2 Section 3.
Chapter 2 Motion Along a Line. MFMcGraw- PHY 1410Ch_02b-Revised 5/31/20102 Motion Along a Line Position & Displacement Speed & Velocity Acceleration Describing.
Physics 151 Week 5 Day 3 Topics Motion with constant acceleration
Copyright © 2010 Pearson Education, Inc. Accelerated Motion Chapter 3 Review.
CBA #1 Review Graphing Motion 1-D Kinematics Projectile Motion Circular Motion Gravity Graphing Motion 1-D Kinematics Projectile Motion Circular.
CBA #1 Review Graphing Motion 1-D Kinematics
Motion Motion Motion – Occurs when an object changes position relative to a reference point – Don’t have to see it move to motion took place.
By noting the distance the jogger moves in equal time intervals, you can determine that the jogger is standing still (a), moving at a constant speed (b),
Acceleration and Free Fall
Free Fall Chapter 2 Section 3. Free Fall Free Fall – An object in free fall falls at a constant acceleration towards the surface of a planet neglecting.
Continued Projectile Motion Practice 11/11/2013. Seed Question Six rocks with different masses are thrown straight upward from the same height at the.
Lots of fun! Win valuable prizes!
Forces and Motion Chapter 12.
Galileo Galilei was the first to make an analysis of the motion of freely falling objects. Based on his experimentations and reasoned deductions, Galileo.
CHAPTER 3 ACCELERATION AND FREE FALL. ACCELERATION.
Large scale Small scale Fast vs. slow Frame of reference?
Representing Motion. Motion We are looking to ____________and ____________an object in motion. Three “rules” we will follow: –The motion is in a __________________.
Motion. Some Motion Terms Distance & Displacement Velocity & Speed Acceleration Uniform motion Scalar.vs. vector.
25 pt. 5 pt. 10 pt. 15 pt. 20 pt. 25 pt. 5 pt. 10 pt. 15 pt. 20 pt. 25 pt. 5 pt. 10 pt. 15 pt. 20 pt. 25 pt. 5 pt. 10 pt. 15 pt. 20 pt. 25.
Questions: Do heavier objects fall faster than lighter ones when starting from the same position? Does air resistance matter? If the free fall motion has.
Motion in One Dimension
FORCES AND MOTION REVIEW. 1 POINT A baseball and a cannonball are dropped at the same time. Which one will hit first?
Change in Velocity Each time you take a step you are changing the velocity of your body. Each time you take a step you are changing the velocity of your.
CHAPTER 3 ACCELERATION Defining Acceleration: -Term -Motion Diagram -Graphic Relationships -Kinematic equations.
Vertical Motion Problems
Chapter 2: Describing Motion in 1-D. Frame of Reference Whether or not you are moving depends on your point-of-view. From inside the box car, the woman.
Cutnell/Johnson Physics 8th edition Reading Quiz Questions
Motion Graphs Position vs. time. Vocabulary Position Where you are relative to the origin (reference point/observer) Distance The total length of how.
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