Today Finish Newton’s Laws More Forces.

Slides:

Advertisements

Similar presentations

Newton's First Law of Motion

Advertisements

Newton’s Laws of Motion - 2. Multiple Objects – Example with m 2 > m 1 Draw free body diagrams for each object. In magnitude, a 1 = a 2.

Warm-up 1. If a toy train has a mass of 1.5 kg & accelerates at a rate of 20 m/s2, what is the amount of force acting on it? 2. Make a Venn diagram comparing/contrasting.

Forces behind forces Chemical structures, which are essentially combinations of electromagnetic attractions and repulsions, give solid objects their intrinsic.

10/1 Friction  Text: Chapter 4 section 9  HW 9/30 “Block on a Ramp” due Friday 10/4  Suggested Problems: Ch 4: 56, 58, 60, 74, 75, 76, 79, 102  Talk.

Friction There are many forms of friction. This lesson introduces the force laws for static friction, kinetic friction, and rolling friction. Students.

Nahdir Austin Honors Physics Period 2.  Force: A push or pull on an object (something that can accelerate objects.  A force is measured by a Newton.

EVERY-DAY FORCES Force of gravity Normal force Force of friction Universal force of gravity.

Resistance in Mechanical Systems 4.1. Newton’s Second Law of Motion The acceleration of an object is directly proportional to the net force acting on.

Simplifying Problems. used to isolate a system of interest and to identify and analyze the external forces that act directly upon it Free-Body Diagrams.

Friction And Forces in Two Dimensions. Review A force is a push or pull. A force is a push or pull. Newton’s 3 Laws of Motion: Newton’s 3 Laws of Motion:

Newton’s Laws of Motion 1. If the sum of all external forces on an object is zero, then its speed and direction will not change. Inertia 2. If a nonzero.

Newton’s 2 nd Law. Enduring Understanding: Studying dynamics (causes of motion) has had a profound effect on the way humans view their world. Essential.

Chapter 4 Forces and the Laws of Motion. Newton’s First Law An object at rest remains at rest, and an object in motion continues in motion with constant.

Chapter 4 Dynamics: Newton’s Laws of Motion

PHYS16 – Lecture 10 & 11 Force and Newton’s Laws September 29 and October 1, 2010

1 Some application & Forces of Friction. 2 Example: When two objects of unequal mass are hung vertically over a frictionless pulley of negligible mass,

Force & Newton’s Laws of Motion. FORCE Act of pulling or pushing Act of pulling or pushing Vector quantity that causes an acceleration when unbalanced.

Bellwork Pick up a free-body diagram sheet and begin working on it.

Chapter 5:Using Newton’s Laws: Friction, Circular Motion, Drag Forces.

Newton’s 2nd Law of Motion. Forces A push or pull The cause of an acceleration Cause of a change in an object’s state of motion Cause objects to speed.

SECTION 5.2 FRICTION Define the friction force.

Chapter 5 Two Dimensional Forces Equilibrium An object either at rest or moving with a constant velocity is said to be in equilibrium The net force acting.

Newton’s 2 nd Law: More Practice. Newton’s 3 rd Law SPH4C.

 Friction – force that opposes motion  Caused by microscopic irregularities of a surface  The friction force is the force exerted by a surface as an.

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.

REVISION NEWTON’S LAW. Quantity with magnitude and direction. e.g. displacement, velocity, acceleration, force and weight.. VECTOR Quantity having only.

Laws of Motion Review.

1 Newton’s Third Law Readings: Chapter 8. 2 Newton’s Third Law When you have more than 1 system the Newton’s Third Law can provide an additional information.

An 7.3-kg object rests on the floor of an elevator which is accelerating downward at a rate of 1.0 m/s 2. What is the magnitude of the force the object.

6 Applications of Newton’s Laws 6-1 Frictional Forces What is friction? To slide one such surface across another requires a force large enough to overcome.

NEWTON'S LAWS OF MOTION Philosophiae Naturalis Principia Mathematica (1686)

SPH3U – Unit 2 Friction.

Chapter 5 Applications of Newton’s Law

Chapter 5 Applications of Newton’s Law

Lecture 2: More Forces.

Applications of Newton’s Laws

Physics 111: Mechanics Lecture 5

Chapter 5:Using Newton’s Laws: Friction, Circular Motion, Drag Forces

Miscellaneous Forces.

Physics Section 4.3 Apply Newton’s 2nd and 3rd Law of Motion

The force of Friction Chapter 4.4.

Newton’s Laws Acceleration

Friction Newton’s 2nd Law with Friction Examples Outline.

Aim: How do we explain Newton’s 3rd Law?

Aim: How do we explain the force of friction?

SPH4U: Friction What is it? Systematic catagories of forces

Topic: Force Physics 231.

Two Dimensional Forces

Purdue University, Physics 220

Chapter 4 Laws of Motion.

SPH4U: Lecture 7 Today’s Agenda

Today Finish Newton’s Laws More Forces.

Newton’s Laws of Motion

Forces of Friction When an object is in motion on a surface or through a viscous medium, there will be a resistance to the motion This is due to the interactions.

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

Physics: Forces and Newton’s Laws

Motion in 2D and Pulleys Constant acceleration in 2-D Free fall in 2-D

Friction and Normal Force

Forces and Newton’s Laws of Motion

Aim: How do we explain the force of friction?

Newton’s 3rd Law.

Aim: How do we explain Newton’s 3rd Law?

How does an inclined plane make work easier How does an inclined plane make work easier? How does it change the force that is applied to the inclined.

Question C Force and Motion F F m F F m d d

Newton’s Third Law + Review

Presentation transcript:

Today Finish Newton’s Laws More Forces

Friction(Static) No motion between surfaces (can be rolling) Magnitude of frictional force (parallel to surfaces) is proportional to the normal force. fstatic <= ms N ms coefficient of Static friction Be Careful! Static friction <=, can be any value up to msN It is reactive just like Normal, Tension 42

Example: speeding truck What is the magnitude of the force of friction on box? m=10kg µs = 0.4 a= 2m/s2

Example: speeding truck What is the maximum acceleration of the truck? m=10kg µs = 0.4 a= 2m/s2

Friction (kinetic) Similar name, but behaves very differently! fkinetic = mk N mk coefficient of Kinetic friction The equals sign means we always know the magnitude Direction is always opposite of motion

Example: pulling a box 40N m=10kg µk=0.3

Newton’s 3rd law Forces come in pairs Same type (gravity, normal, friction) Different objects Always same magnitude, opposite direction

Example: pulling 2 blocks T 10kg 5kg frictionless Solve for acceleration Solve for tension

Example: pulling 2 blocks T 10kg 5kg µk= 0.2 Solve for acceleration Solve for tension