Free body diagrams, acceleration, quiz Friday, November 6, 2015.

Slides:

Advertisements

Similar presentations

Forces A force is an interaction (push or pull) between objects. Forces can be divided into two categories: 1.Contact forces Push or pull between two objects.

Advertisements

Newton’s 2 nd Law Of Motion By Mr. Yum. Newton’s 2 nd Law Newton’s 2 nd Law is defined as: Newton’s 2 nd Law is defined as: F = m x a Where, F = force,

Lecture 4 Monday: 26 January 2004 Newton’s Laws of Motion.

Newton’s First and Second Laws of Motion

The Laws of Motion Unit 3 Presentation 1.

Chapter 4 Physics. Section 4-1 I. Forces A. Def- a push or pull; the cause of acceleration. B. Unit: Newton Def- amt. of force when acting on a 1 kg mass.

Newton’s 2 nd Law. Force on Object Objects acted on by a net unbalanced force will accelerate in the direction of the force This means they will speed.

Free-Body Diagrams October 31, 2013.

 How would you describe “friction” to someone who didn’t know that word?  What do you think the word “Force” means?

Force A push or pull exerted on an object..

Newton’s Second Law of Motion. And it states … The acceleration of an object will be in the same direction and directly proportional to the net force.

Free Body Diagrams A simplified way to draw an object and all the forces that are acting on it.

Newton’s 2 nd & 3 rd Laws. A couple things to keep straight Mass = the amount of “stuff” something is made of. Weight = the measure of the force of gravity.

AIM: What are Newton’s three laws, and how do they describe how an object behaves? Do Now: - Draw a Free Body Diagram for the block below if 1. it is at.

Newton’s 2 nd and 3 rd laws Wednesday, October 1, 2014.

A Force Caused by Gravity.  If we apply Newton’s 2 nd Law to objects accelerating due to gravity F G = mg  F G – force of gravity, commonly called.

Newton’s Laws of Motion What are forces? How can diagrams be used to depict and analyze the forces acting on an object? What are the effects of net force.

PAP Physics. Unit is the NEWTON(N) Is by definition a push or a pull Can exist during physical contact (Tension, Friction, Applied Force) Can exist with.

Newton’s First Law Level 1 Physics.

Newton’s Second Law October 29, Tuesday, 10/29  Pick up video note taking guide from the Physics bin  Use your notes from yesterday to respond.

Newton’s 2 nd Law of Motion By: Heather Britton. Newton’s 2 nd Law of Motion Newton’s 2 nd Law of Motion states... The acceleration of an object is directly.

Forces. Force: A push or a pull on an object. A vector quantity. Two Types of Forces: Contact Forces: When the object is directly pushed or pulled. Field.

Aim: What is Newton’s 2 nd law of motion? Do Now: What is the net (resultant) force? m = 5 kg 10 N8 N Answer will be given shortly.

Notes Force. Force is a push or pull exerted on some object. Forces cause changes in velocity. The SI unit for force is the Newton. 1 Newton = 1 kg m/s.

Equilibrium & Newton’s 2nd Law of Motion

Remember!!!! Force Vocabulary is due tomorrow

6-1 Force and Motion.

Happy Monday! Grab your calculator 2. Get ready for warm up #5

 Force: A push or a pull Describes why objects move Defined by Sir Isaac Newton.

Forces Test Friday, November 20, Friday, 11/20 Unit 4: Forces  Last chance to turn in missing work for the forces unit!  Respond to the following.

Newton’s Laws 10min test q1 Motion direction pull Weight (force due to gravity – don’t just say ‘gravity’) Friction (opposite to the motion) Contact force.

Basic Information: Force: A push or pull on an object Forces can cause an object to: Speed up Slow down Change direction Basically, Forces can cause an.

Forces Wednesday, November 4, 2015 Wednesday, 11/4 Unit 4: Work and Forces  Pick up a warm-up sheet  Take out your homework from Monday (video notes)

Newton’s third Law, Quiz, Review Tuesday, November 17, 2015.

Newton’s first and second laws Lecture 2 Pre-reading : KJF §4.3 and 4.4.

Force and Motion The only reason an object changes it velocity is because a force acts on the object. Remember a change in velocity can be either a change.

Instructions for using this template. Remember this is Jeopardy, so where I have written “Answer” this is the prompt the students will see, and where.

Free Body Diagrams, acceleration, quiz Monday, November 9, 2015.

Science Starter! Draw a free-body diagram for: 1)A chair at rest on the floor. 2) A ball rolling to the right and slowing down across a grassy field.

Newton’s Three Laws of Motion. Newton’s 2 nd Law.

Newton’s 2 nd and 3 rd laws Tuesday, September 30, 2014.

Newton’s 1 st Law: More Practice.

Enduring Understanding: Studying dynamics (causes of motion) has had a profound effect on the way humans view their world. Essential Question: What may.

Physics and Forces Dynamics Newton’s Laws of Motion  Newton's laws are only valid in inertial reference frames:  This excludes rotating and accelerating.

Forces Wednesday, November 4, 2015 Wednesday, 11/4 Unit 4: Work and Forces Warm Up Questions: 1. What causes an object to accelerate? 2. What is the.

Inertia or Weight? Newton’s 1 st & 2 nd Laws Name that Force Newton’s 3 rd Law

Inertia, intro to vectors, FBD Wednesday, September 7, 2016.

Acceleration and net force equations

Apply Newton’s First Law to the following illustration.

Inertia, intro to vectors, FBD

Mass vs. Weight.

Bell Ringer Name three types of forces and what they do.

Review What do we already know?

Newton’s Laws.

Free Body diagrams and problem solving

Newton's 2nd Law Notes Mass vs. Weight.

Which one would be easier to accelerate by pushing?

Chapter 4 Forces.

Newton’s 1st and 2nd Laws of Motion

Newton’s Laws of Motion Chapters 2,3,6,7

Physical Science Chapter 12 Section 1

Warm-Up Sept 4, Sept 5, 2013 Describe the actions necessary to move a box from one side of the room to the other. Where are all the safety.

Forces and Newton’s Laws of Motion

Newton’s Laws of Motion

Use these to prepare your ½ sheet of notes for the test!

Forces in One Dimension

How to draw, read, and work with free body diagrams.

Force A push or pull exerted on an object..

(insert scary music here)

Presentation transcript:

Free body diagrams, acceleration, quiz Friday, November 6, 2015

Friday, 11/6 Unit 4: Forces  Respond to the following questions for both pictures. 1. Using your knowledge of inertia, describe how the image demonstrates Newton’s 1 st Law of motion. 2. What could you do to change the motion of the bus or the race car? Upcoming dates  Friday, 11/6 – quiz  Monday, 11/16 – quiz  Monday, 11/16 – review due at when the late bell rings  Wednesday, 11/ 18 – Unit 4 test  W/O 11/23 – Thanksgiving break  Friday, 12/11 – 2NW extra credit due

Weight vs. Mass  Mass is matter (atoms)  Weight is the force of gravity acting on mass.  Weight is represented by the symbol F g  F g will always act on an object.

How to Calculate force of gravity (weight) Note: when calculating F g acceleration will always be 9.8 m/s 2

Example – calculating weight (F g ) A child pulls a wagon with a mass of 6 kg, ten meters across the grass to the garage. The child applies a 10 N force to overcome 2Ns of friction. Calculate the weight of the wagon. G: m = 6kgE: F g = (m)(a)S: 58.8 N U: F g S: F g = (6)(9.8)

Practice calculating weight (F g )

245 N 14.7 N 1127 N

How to calculate force Note: acceleration will not Be 9.8 m/s 2 unless the object Is in free-fall.

How to Calculate net force

Net Force - answers

Newton’s 2 nd Law – Practice problem 1 A car has a mass of 550 kg. 1. Find the weight of the car on Earth 2. Find the net force needed to accelerate the car at 12 m/s If a net force of 2200 N were to act on the car, what would its acceleration be?

Newton’s 2 nd Law – Practice problem 2 A sled weighs 2500 N on Earth 1. What is the mass of the sled? 2. What is the mass of the sled on the moon, where g = 1.6 m/s 2 ? 3. What is the weight of the sled on the moon? 4. What net force is needed to accelerate the object at 4.0 m/s 2 on the moon?

Free body diagram (FBD)  Pictorial representation of forces acting on an object.

Free body diagram steps 1. Replace the object with a dot. 2. Identify the force pairs acting on the object 3. Identify contact forces acting on the object. Remember that only something that is physically touching the object can apply a contact force Possible types of contact forces – push, tension, normal, and friction 4. Add arrows force and label the forces 5. Add any force values that are known

Example - FBD A child pulls a wagon with a mass of 6 kg, ten meters across the grass to the garage. The child applies a 10 N force to overcome 2Ns of friction. Calculate the weight of the wagon.