Chapter Thirteen: Forces 13.1 Forces. Investigation 13A What is force and how is it measured? Forces.

Slides:

Advertisements

Similar presentations

September 25, 2009 Bellringer Would it be better if the floor at the skating rink had carpet on it? Explain.

Advertisements

The Nature of Force Chapter 10 section 1.

Physical Science  This test covers what you learned in Unit 1 including: ◦ Contact and Non-Contact Forces ◦ How to measure motion (speed and velocity)

Forces in Equilibrium Chapter 5.

(Types of forces part 1). A force is a push or pull, or any action that has the ability to change motion.

Club Imagination Force & Motion. Sir Isaac Newton.

NAME: _______________________________________ Forces Do Now

Force and Motion Notes.

Friction - Friction - is a force that resists the motion of objects on surfaces. Jennifer Brown.

TYPES OF FORCES AND FRICTION Forces.  A force is a push or a pull that acts on an object  A force can cause a resting object to move or it can accelerate.

Chapter 5 and 6 Topics: Forces and Friction. 5.1 The cause of forces A force is a push or pull, or an action that has the ability to change motion. Forces.

Forces & motion 2012.

Chapter Five: Forces 5.1 Forces 5.2 Friction

Forces Pages 188 to 191. Forces Force - a push or a pull, measured in Newtons (N) Contact Force – is a push or a pull one object applies to another object.

Motion and Force Chapter Twelve: Distance, Time, and Speed Chapter Thirteen: Forces Chapter Fourteen: Force and Motion.

Chapter 3 Section 3 Pages 81-86

Newton’s Laws.  Calculus  Light is composed of rainbow colors  Reflecting Telescope  Laws of Motion  Theory of Gravitation Sir Isaac Newton.

Motion and Force Chapter Four: Forces 4.1 Forces 4.2 Friction 4.3 Forces and Equilibrium.

The Nature of Force Chapter 3 section 4 What is a force Force is a push or pull. Forces are either balanced or unbalanced.

Forces 1 Forces 2 Friction 3 Forces and Equilibrium.

FORCES. Chapter Five: Forces  5.1 Forces  5.2 Friction  5.3 Forces and Equilibrium.

Forces and Motion PS C-5.

First Law : An object at rest stays at rest. An object in motion, stays in motion, unless acted upon by an unbalanced force.

Chapter 10 Section 2 Friction.

Chapter Five: Forces 5.1 Forces 5.2 Friction

Chapter 5.2 Learning Goals  Define friction.  Identify causes of friction.  Distinguish among various types of friction.

Forces Pages 188 to 191. Forces Force - a push or a pull, measured in Newtons (N) Contact Force – is a push or a pull one object applies to another object.

Chapter Five: Force  5.1 Forces  5.2 Friction  5.3 Forces and Equilibrium.

Sailing into Physics Friction using Car and Ramp and the Engineering Design Cycle.

Main Idea: Forces  5.1 Forces  5.2 Friction  5.3 Forces and Equilibrium.

6.2 Friction. Chapter 6 Objectives  Calculate the weight of an object using the strength of gravity (g) and mass.  Describe the difference between mass.

Motion and Force Standards Students know that a force has a direction and magnitude. Students know when an object is subject to two or more forces at.

Friction Friction is a force that resists the motion of objects or surfaces. Many kinds of friction exist.

Chapter 3 Forces & Motion. Newton’s 1 st Law of Motion An object at rest will remain at rest unless acted upon by an unbalanced force. An object in motion.

Unit 8B: Forces Newton’s Laws of Motion

Chapter 5 Forces 5.2 Friction pp IMPORTANT DEFINITION ► Friction – a force that opposes motion between two surfaces that are touching.

Newton’s 1st Law of motion

Friction, and Gravity.

How does friction affect motion?

Forces and Newton’s Laws

Forces: Newton’s Laws of Motion

bellringer In your composition books

Motion and Force. Motion and Force Chapter Four: Forces 4.1 Forces 4.2 Friction 4.3 Forces and Equilibrium.

Forces and Newton’s Laws

Friction and Gravity Notes

Chapter Five: Forces 5.1 Forces 5.2 Friction

What Happens When Forces Act on Objects?

Gravity and Friction Vocabulary

Mon. Mar. 31 Do Now If you graph speed vs. time, does speed or time go on the x-axis? Does the dependent or independent variable go on the x-axis?

Effects of Forces on Speed and Direction

Section 2 – pg 380 Friction, Gravity, and Elastic Forces

Motion and Force. Motion and Force Chapter Four: Forces 4.1 Forces 4.2 Friction 4.3 Forces and Equilibrium.

Motion and Force. Motion and Force Chapter Four: Forces 4.1 Forces 4.2 Friction 4.3 Forces and Equilibrium.

Chapter Five: Forces 5.1 Forces 5.2 Friction

Motion and Force. Motion and Force Chapter Thirteen: Forces 4.2 Addition of Forces and Equilibrium.

Warm up 9/14 Draw and Solve.

Checking for Understanding: Friction

Warm up 9/9-10 What is the formula and momentum for a cannonball with a mass of 30 kg traveling at a velocity at 40 m/s south.

Chapter Five: Forces 5.1 Forces 5.2 Friction

Club Imagination Energy.

Chapter 5-2 The Foundations of Physical Science

How does friction affect motion?

Chapter Five: Forces 5.1 Forces 5.2 Friction

Motion and Force. Motion and Force Chapter Four: Forces 4.1 Forces 4.2 Friction 4.3 Forces and Equilibrium.

Chapter 5.2 Learning Goals

Friction, Gravity, & Elastic Forces

Presentation transcript:

Chapter Thirteen: Forces 13.1 Forces

Investigation 13A What is force and how is it measured? Forces

13.1 The cause of forces A force is a push or pull, or any action that has the ability to change motion. The key word here is action, force is an action.

13.1 Units of force When you measure weight in pounds on a scale, you are measuring the force of gravity acting on the object. The word “pound” comes from the Latin word pondus, which means “weight.”

13.1 The cause of forces One pound of force equals 4.48 newtons.

13.1 Gravity and weight The force of gravity on an object is called weight. Mass and weight are not the same thing!

13.1 Gravity and weight A 10-kilogram rock has a mass of 10 kilograms no matter where it is in the universe. A 10-kilogram rock’s weight however, can vary greatly depending on where it is.

13.1 Calculating weight The weight equation can be rearranged into three forms to calculate weight, mass, or the strength of gravity.

Calculating Weight Practice Problems

DAY 2 STARTS HERE

13.1 Friction Friction is a force that resists the motion of objects or surfaces. Many kinds of friction exist.

13.1 Friction Friction depends on both of the surfaces in contact. When the hockey puck slides on ice, a thin layer of water between the rubber and the ice allows the puck to slide easily.

13.1 Identifying friction forces Friction is a force, measured in newtons just like any other force. Static friction keeps an object at rest from moving.

13.1 Identifying friction forces Sliding friction is a force that resists the motion of an object moving across a surface.

13.1 A model for friction The greater the force squeezing two surfaces together, the greater the friction force.

13.1 Reducing the force of friction Unless a force is constantly applied, friction will slow all motion to a stop eventually. It is impossible to completely get rid of friction, but it can be reduced.

13.1 Reducing the force of friction The friction between a shaft (the long pole in the picture) and an outer part of a machine produces a lot of heat. Friction can be reduced by placing ball bearings between the shaft and the outer part.

13.1 Useful friction Friction is also important to anyone driving a car. Grooved tire treads allow space for water to be channeled away from the road-tire contac point, allowing for more friction in wet conditions.

13.1 Useful friction Shoes are designed to increase the friction between their soles and the ground. Players wearing cleats can apply much greater forces against the ground to help them move and to keep from slipping. Why do you think these shoes increase friction?