1 / 12

120 likes | 304 Vues

Force. Force Defined. A ________ or _______. (an action that has the ability to change motion) Causes objects to : Start moving ______________ up/slow down Change _____________ Measured in Newtons (N) with a spring scale (1 lb. = 4.448 newtons ). Types of Force. Net Force-(F N )

Télécharger la présentation
## Force

**An Image/Link below is provided (as is) to download presentation**
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.
Content is provided to you AS IS for your information and personal use only.
Download presentation by click this link.
While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

**Force Defined**• A ________ or _______. (an action that has the ability to change motion) • Causes objects to: • Start moving • ______________ up/slow down • Change _____________ • Measured in Newtons (N) with a spring scale (1 lb. = 4.448 newtons)**Types of Force**• Net Force-(FN) • Involves a ___________ of forces • It is the overall or __________ force • Effort / Applied Force (FEor FA )- the push or pull ________ to an object • Tension- ___________ force**Types of Force, cont.**• Gravitational (gravity)- force of __________ between objects. • Weight (another force): the amount gravity pulling on a ___________. http://www.exploratorium.edu/ronh/weight - Increase mass = increase weight • Decrease distance = increase attraction (gravity) = increase in weight • Support - (Fs) • _________opposite to the force of gravity • Also called the normal force • Centripetal- (will talk about this later)**Types of Force, cont.**• Electrical / “electromotive force (emf)” – • Emf: the force that ________ electrons to make electricity • Electrical- opposite charges attract and same charges repel • Magnetic- opposites poles of a magnet attract; same poles repel • Friction (FFr)- force that acts in a direction ______________ to applied force.**Friction(see handout)**• For an object to move the applied force must be _________ than the force of friction • Types of friction: • Sliding • Rolling • Fluid • Static • The amount of friction depends on the contact between materials**Balanced and Unbalanced Forces(see handout)**• Balanced – forces acting in OPPOSITE directions • Unbalanced- forces acting in the SAME direction**Centripetal Force “aiming toward the center”**• For objects in circular motion • Force is pointed or directed _________ the __________**Projectile Motion**• Projectile- any object ____________ or thrown into the air. • Projectile is affected by two things: • ______________ motion and velocity = object continues in a straight path due to its inertia • ______________ motion and velocity= object is pulled downward due to the force of gravity • Horizontal and vertical motion create a __________ path called a trajectory • (see hand out for picture)**Kepler’s Laws of Planetary Motion**• Johannes Kepler developed 3 laws of planetary motion • 1st Law= planets ___________ around the sun in the shape of an ____________ with sun at one focus (or center).**Bernoulli’s Principle**• As the speed in a fluid increases the pressure in that fluid decreases. • Creates “lift” for an airplane or your ping pong ball!**Archimedes Principle**• Upward force acting on a fluid is called the buoyant force. • For liquids this force is made by the amount of liquid displaced by an object. • Buoyant force >equal to object’s weight the object floats. • Buoyant force < object’s weight the object sinks.

More Related