8.2 Acceleration and Force Graph of Speed (distance/time)

Slides:

Advertisements

Similar presentations

Chapter: Forces and Changes in Motion

Advertisements

Friction and Gravity.

Newton’s Laws and Forces. Forces Force = a push or pull – changes speed of an object – changes direction of an object – can be touching or long distance.

Net Forces, Friction, Coefficients of Friction. 2 Sliding Book Example Why do things not continue to move at constant velocity?Why do things not continue.

Bellringer Answer the following two questions in complete sentences.

Student Text Pages Guided Reading and Study Worksheet

Chapter 2: Force and Newton’s Laws

Friction Gravity Newton’s Laws Momentum Forces.

UCSD Physics 10 Net Forces, Friction, Air Resistance.

UCSD Physics 10 Net Forces, Friction, Air Resistance Let’s get real.

Free Fall & Air Resistance The Earth’s ________ pulls objects towards its center When the only force acting on a falling object is gravity, the object.

Free Body Diagram. Used to show all net forces acting on an object What can an object with a net force of zero be doing?

Mrs. Wharton’s Science Class

Force and Gravity.

Net Forces, Friction, Air Resistance

Recall the Sliding Book Example Why do things not continue to move at constant velocity? – Don’t things strive to be at rest (I know I do)? If the sliding.

Ch. 8.2 Acceleration and Force

Friction and Gravity.

Chapter 2, Section 2 Friction and Gravity

What is net force?.

Objectives WARM UP Identify forces of motion

JEOPARDY Force and motion. Force Motion 2 Motion 2 Newton’s Laws Newton’s Laws of Motion of Motion Newton’s Laws Newton’s Laws of Motion 2 of Motion 2.

Unit 1 AMSTI: Forces & Motion

Forces & motion 2012.

CHAPTER 3. Newton’s Second Law of Motion F = m × a Force = mass × acceleration The faster you run into a wall, the more force you exert on that wall Units.

Lecture 11: Laws of motion. Newton’s 1 st Law: Inertia Matter resists motion If at rest, it will stay at rest If in motion, it will stay in motion Mass.

Newton’s Second Law of Motion. Newton’s Second Law Newton’s Second Law of Motion- Acceleration depends on the objects mass and the net force acting on.

Newton’s first law states that if the net force acting on an object is zero, the object remains at rest, or if the object is already moving, continues.

Motion & Forces.

Physics the study of the relationship between matter and energy

Forces Friction & Gravity Chapter 2 Section 3. Friction The force that resists motion Smooth or rough? How hard are the objects pushed together?

CHAPTER 8 REVIEW MS. PAREKH. WHAT IS A REFERENCE POINT? IT IS THE STARTING POINT USED TO LOCATE ANOTHER PLACE OR THING.

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.

Forces Motion and Forces. Forces What is a force? A force is a push or pull. What happens when forces combine? Forces combine to produce a net force.

Net Forces, Friction, Coefficients of Friction Newton’s 3rd Law.

Air Resistance and Free Body Diagrams

Gravity and Air Resistance. Free Fall When falling the only force acting on an object is gravity Type of force when in free fall: unbalanced force Objects.

FRICTION AND GRAVITY.

FORCES CH. 2. What is a Force? Def: a push or a pull –Measured in Newtons Kg · m/s 2 –Balanced Force – an equal but opposite force acting on an object.

“Law of Acceleration” Forces can be BALANCED or UNBALANCED Balanced forces are equal in size (magnitude) and opposite in direction UNbalanced.

What are different types of forces? What factors affect the force of gravity? What happens when forces combine? How are balanced and unbalanced forces.

Chapter 11: Force and Newton’s Laws

Motion Speed Velocity Acceleration Force Newton’s Laws

Forces Chapter 3.

Lec 04: Newton’s Second Law

Force and Motion.

Motion & Forces.

The Nature of Forces.

Motion & Forces.

Chapter: Newton’s Laws of Motion

DO NOW: Sit in your assigned seats (new seats starting Monday)

SSA Review - 9 Forces & Motion

Forces Affecting Motion

FCAT Review - 9 Forces & Motion

Gravity: A force with which to be reckoned.

Vocabulary you need to know

Let’s do some cutting!!! GLUE

Some definitions: Weight vs mass

Force & Motion.

Forces and Friction.

Lesson 3 Reading Guide - Vocab

Presentation transcript:

8.2 Acceleration and Force

Graph of Speed (distance/time)

Speeding up and Slowing down

Which car is accelerating?

Why it’s m/s 2 a = change in velocity (m/s) divided by time (s) _m/s__ = m/s X 1/s = m/s 2 s

Balanced and Unbalanced Forces A balanced force is present when equal forces are applied to each side of an object. An unbalanced force is present when unequal forces are applied to each side of an object. In the picture below, the forces are balanced when the horizontal bar is level. The forces are unbalanced when the horizontal bar is unleveled..

Direction of Forces is Important Force #1 Force #2 Force #1 Force #2 Total Force Total Force = 0

Friction is a Force Force on person by box Force on floor by box Force on box by floor It’s the sum of all the forces that determines the acceleration. Every force has an equal & opposite partner. Force on box by person

Friction Mechanism Corrugations in the surfaces grind when things slide. Lubricants fill in the gaps and let things slide more easily.

Why Doesn’t Gravity Make the Box Fall? Force of Earth acting on Box (weight) Force of Floor acting on Box Force from floor on box cancels gravity. If the floor vanished, the box would begin to fall.

What’s missing in this picture? Force on person by box Force on floor by box Force on box by floor Force on box by person A pair of forces acting between person and floor.

Air Resistance – air creates friction

What is gravity?

Gravity (g) Gravity is a force of attraction between objects. The more massive the object, the greater the pull. However, the object has to be really massive, like Earth, for the pull to be obvious to the casual observer.

What are some EFFECTS of gravity? Weight Liquids conform to the bottom of a container. Objects fall. Hot air rises, cool air sinks. Liquids of different density settle in layers.

Which falls faster?

Gravitational Acceleration in Free Fall is 9.8 m/s 2