Chapter 2 Forces 2 1 Forces change motion

  • Slides: 13
Download presentation
Chapter 2 Forces

Chapter 2 Forces

2. 1 – Forces change motion A force is a push or a pull

2. 1 – Forces change motion A force is a push or a pull – A force can change motion, speed, and direction

Types of Forces Contact Force Gravity Friction

Types of Forces Contact Force Gravity Friction

Contact Force When one object pushes or pulls another object by touching it, the

Contact Force When one object pushes or pulls another object by touching it, the first object is applying a contact force to the second.

Gravity is the force of attraction between two masses The strength of the gravitational

Gravity is the force of attraction between two masses The strength of the gravitational force between two objects depend on their masses.

friction Friction is a force that resists motion between two surfaces that are pressed

friction Friction is a force that resists motion between two surfaces that are pressed together.

Size and direction of forces Force is a vector (like velocity) – it has

Size and direction of forces Force is a vector (like velocity) – it has both size and direction.

Balanced and unbalanced forces Net Force - The overall force acting on an object

Balanced and unbalanced forces Net Force - The overall force acting on an object when all the forces are combined. If the net force is equal to zero (0), the forces acting on the object are balanced. The object does NOT move. Only unbalanced forces can change the motion of an object.

An example of balanced forces If both individuals apply the same amount of force,

An example of balanced forces If both individuals apply the same amount of force, then the box will NOT move.

Another example of balanced forces Even though this guy hits the wall hard, the

Another example of balanced forces Even though this guy hits the wall hard, the wall returns the same amount of force, thus the forces are balanced. The wall doesn’t move.

Newton’s first law relates force and motion Objects at rest remain at rest, and

Newton’s first law relates force and motion Objects at rest remain at rest, and objects in motion remain in motion with the same velocity, unless acted upon by an unbalanced force.

inertia The resistance of an object to a change in the speed or the

inertia The resistance of an object to a change in the speed or the direction of its motion.

MOTION AND FORCES MOTION Motion A change inMOTION AND FORCES MOTION Motion A change in
MOTION AND FORCES MOTION Motion A change inMOTION AND FORCES MOTION Motion A change in
Chapter 11 Forces 11 1 Forces change motionChapter 11 Forces 11 1 Forces change motion
Translational Motion Projectile Motion Circular Motion Motion MapTranslational Motion Projectile Motion Circular Motion Motion Map
Describing Motion and Forces Newtons Laws Motion MotionDescribing Motion and Forces Newtons Laws Motion Motion
MOTION AND FORCES WHAT IS MOTION Motion isMOTION AND FORCES WHAT IS MOTION Motion is
Forces Motion Chapters 2 3 Motion 1 MotionForces Motion Chapters 2 3 Motion 1 Motion
Motion Forces V Nonlinear Motion Projectile Motion uMotion Forces V Nonlinear Motion Projectile Motion u
Forces Affecting Motion What is Motion Motion isForces Affecting Motion What is Motion Motion is
Forces and Motion Forces Acceleration Motion Velocity SpeedForces and Motion Forces Acceleration Motion Velocity Speed
Forces and Motion Review Macroscopic Forces Determine motionForces and Motion Review Macroscopic Forces Determine motion
Forces Motion Forces n Forces are acting allForces Motion Forces n Forces are acting all