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Effects of Forces Change shapeChange shape
Effects of Forces Change shapeChange shape
Change of Shape
extension Force is directly proportional to extension
When force doubles, the extension doublesWhen force doubles, the extension doubles F α xF α x F x = constant Hooke’s Law
Force is directly proportional to extension F1F1 x1x1 = F2F2 x2x2 m1m1 x1x1 = m2m2 x2x2
What if we put more weights than we did? Limit of proportionality See p.23 SQ and Key PointsSee p.29 question 5
Effects of Forces Change the state of motionChange the state of motion –Move from rest –Speed up –Slow down –Stop –Change its direction
Balanced Forces The book stays still!
Balanced Forces The airplane moves forwards at constant speed!
Balanced Forces The car moves at constant speed! Drag Friction Thrust
Unbalanced Forces The car moves from rest. The car speeds up.
Unbalanced Forces The car slows down to stop. The car slows down. See p.25 SQ and Key PointsSee p.27 SQ and Key Points
Forces act in pairs. Force engine = thrust friction = drag.
Describing Motion Newtons Laws. First we need to define the word FORCE: The cause of motion (what causes objects to move) Two types of forces –Pushes.
Chapter 3 NEWTON’S 1 ST LAW INERTIA. HISTORY OF INERTIA Aristotle: force is necessary to maintain motion Galileo: objects maintain state of motion unless.
Sir Isaac Newton 1642 – 1727 Laws of Motion Potential Energy stored energy Kinetic Energy Energy in motion.
Motion and Force A. Motion 1. Motion is a change in position 2. Reference points are necessary.
Newtons First Law – Inertia An object at rest will stay at rest, and an object in motion will stay in motion, unless acted upon by an outside force.
Chp 3 Newtons Laws of Motion. Force A force is a push or a pull or any action that has the ability to change motion. An object DOES NOT have to move when.
Section 2.1 Outline Forces Change Motion. I. A Force is a Push or a Pull FORCE: a push or a pull Example: picking up your backpack.
LAW OF MOTION. Who figured out most of what we know about how things move?
GO UP, GO DOWN, PUSH ME, AND THROW ME AWAY Illustrate the effects of force (including magnetism, gravity, and friction) on motion. Alfonso Landa.
Newtons Laws of Motion. 1 st Law of Motion An object at rest will stay at rest and an object in motion will stay in motion (in the same direction and.
1 st Law 3 rd Law 2 nd Law People DO NOT create laws governing the natural world. We only identify identify the principles that exist in the physical.
1 1 Force and Pressure. 2 What are Forces? A push or pull.
Friction and Gravity. What is Friction? Friction is the resistance to the sliding, rolling, or flowing motion of an object due to its contact with another.
1. An object in motion tends to stay in motion and an object at rest tends to stay at rest unless acted upon by an unbalanced force. 2. Force equals.
Newtons Laws: Identifying Forces on objects One of the key concepts in Mechanics is identifying what forces are acting and drawing a Force diagram, also.
Newtons Laws of Motion Review. Background Sir Isaac Newton ( ) an English scientist and mathematician famous for his discovery of the law of gravity.
Your science book sits on the table until you pick it up. If you hold your book above the ground, then let go, gravity pulls it to the floor. An object.
Forces and Motion 2 2 Force A force is a push or a pull that one object exerts on another object. Objects like floors, chairs, and Earth also exert forces.
Inertia – A property of mass. It is the tendency of an object to resist changes in motion. Force – A push or a pull.
Warm Up: 9/17 1. Please get the warm up from the front lab table. and turn it in to the cubby when complete. You can use your notes and Distance-Time/Speed-
Newton’s Laws of Motion I. Law of Inertia II. F=ma III. Action-Reaction.
Newton’s Laws of Motion Newton’s 1 st Law of Motion (law of inertia)
Chapter 6 NEWTON’S 2 ND LAW Unbalanced Force Causes Acceleration.
Chapter 12 - Forces 1- Newtons First and Second Laws 2- Gravity 3 - Newtons Third Law.
Aim: What are Newtons 1 st and 3 rd Laws of Motion? Do Now: What is the weight of the box? m = 20 kg F g = mg F g = (20 kg)(9.8 m/s 2 ) F g = 196 N.
Inertia!. History ~300 B.C.E. Aristotle (Greek) ~300 B.C.E. Aristotle (Greek) Divided motion into two categories: Divided motion into two categories:
What is motion? An object is in motion when it’s distance from another object changes. What is a reference point? It is an object or place used to determine.
Chapter 6 Newtons Laws. Sir Isaac Newton December 25, March key figure in scientific revolution ideas considered beginning of modern science.
Chapter 2.3 & 3 Force, Mass and Acceleration Newton’s Laws.
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