Unit 2 Forces Chapter 5 Forces in Equilibrium

Slides:



Advertisements
Similar presentations
Torque and Rotation.
Advertisements

Chapter 9 Objectives Calculate the torque created by a force.
Torque and Rotation Physics.
Torque Torque is defined as the tendency to produce a change in rotational motion.
Torque Chapter 8 Section 1.
Torque: Rotational Statics and Rotational Dynamics Honors Physics.
Force in Mechanical Systems
Forces in Equilibrium Chapter 5.
Torque and Rotation Physics.
Forces.
Houston…we have a problem 1) You learned that if you push on a door far away from it’s hinges (the axis of.
For this review, answer each question then continue to the next page for the correct answer.
Force vs. Torque Forces cause accelerations
PA Multi-Region STEM Partnership Sept 2013 – May 2014 Monthly Meetings (Torque & Center of Mass) Eastern Region Philadelphia/Chester County.
Chapter 9: Torque and Rotation
Torque & Levers Relationship between torque, force, and distance.
Torque, & Rotational Equilibrium
Torque. Torque Torque results when a force acts to rotate an object Torque results when a force acts to rotate an object A force applied to some point.
Torque and Rotational Equilibrium Chapter 8. Torque Rotational equivalent of force Rotational equivalent of force Force isn’t enough to provide a rotation.
DETERMINATION OF TORQUE
Torque and Rotational Equilibrium
Causing Rotational Motion In order to make an object start rotating about an axis, a force is required However, not only the amount of force applied but.
Rotational Equilibrium
Torque. Torque ≡ the action of a leveraged force Torque is the ability of a force to cause rotation or a turning motion. Unbalanced torque provides a.
Torque Torque is an influence which tends to change the rotational motion of an object. One way to quantify a torque is Torque = Force applied x lever.
Torque.
Chapter 8.1 and 8.2 Torque and Angular Rotation. Definition of Torque Torque is the quantity that measures the ability of a force to rotate an object.
Torque. Every time you open a door, turn on a water faucet, or tighten a nut with a wrench, you exert a turning force. Torque is produced by this turning.
Chapter 4 : statics 4-1 Torque Torque, , is the tendency of a force to rotate an object about some axis is an action that causes objects to rotate. Torque.
Mechanical Force Notes
Chapter 8 Rotational Motion.
Key Questions:  What is torque?  How do we calculate torque?
Chapter 9: Rotational Dynamics
Chapter 8 Torque and Rotation  8.2 Torque and Stability  6.5 Center of Mass  8.3 Rotational Inertia Dorsey, Adapted from CPO Science DE Physics.
Torque and Rotation Physics. Torque Force is the action that creates changes in linear motion. For rotational motion, the same force can cause very different.
Torque Give me a lever long enough and a fulcrum on which to place it, and I shall move the world. -Archimedes.
Rotational Motion Chapter 6, 8 and 9. Acceleration in a Circle  Acceleration occurs when velocity changes  This means either speed OR direction changes.
Motion and Forces in 2 and 3 Dimensions Torque and Rotation.
Chapter 8 Statics Statics. Equilibrium An object either at rest or moving with a constant velocity is said to be in equilibrium An object either at rest.
Center of Mass Torque. Center of Mass When analyzing the motion of an extended object, we treat the entire object as if its mass were contained in a single.
Rotational Motion and Equilibrium
Rotational Motion & Torque. Angular Displacement Angular displacement is a measure of the angle a line from the center to a point on the outside edge.
Force in Mechanical Systems
Counterclockwise Turning Effect Clockwise Turning Effect In our last lab we found that the “turning effect” depends on the force and the lever arm. Where.
Rotational Dynamics Rode, Kiana, Tiana, and Celina.
Chapter 1.1 Notes Vectors, Force, Inertia, Torque, Mass & Weight.
Rotational Motion & Torque. Angular Displacement Angular displacement is a measure of the angle a line from the center to a point on the outside edge.
TRANSLATIONAL EQUILIBRIUM A body is in translational equilibrium if no net force is acting on it.
How do you start the rotation of an object? How do you open an door? What did we learn about the best way to open a door? The most efficient way to open.
Torque.
PHY 131 Chapter 8-Part 1.
Torque and Rotation.
Torque and Levers Lesson 5.
Ch. 8 Rotational Motion.
9.1 Torque 1.
Foundations of Physics
Objectives Calculate the torque created by a force.
Torque.
Torque and Rotation Physics.
Bell Work: Centripetal Motion
Levers A lever is a rigid body free to rotate about a fixed point called a fulcrum.
Angular Kinetics: Torques
9.1 Torque Key Question: How does force create rotation?
Moments.
Torque and Levers Lesson 5.
Moment of a Force.
Chapter 8 Rotational Equilibrium and Dynamics
Tor-que? Statics II.
Torque: Rotational Statics and Rotational Dynamics
Machines Levers & Torque.
Presentation transcript:

Unit 2 Forces Chapter 5 Forces in Equilibrium 5.1 The Force Vector 5.2 Forces and Equilibrium 5.3 Friction 5.4 Torque and Rotational Equilibrium

Torque Torque is a measure of how much a force acting on an object causes the object to rotate. Torque causes objects to rotate or spin. Torque is the rotational equivalent of force. The canoe rotates counterclockwise hits both docks if the forces are applied accordingly.

Torque The line about which an object turns is its axis of rotation. Some objects have a fixed axis. A door’s axis is fixed at the hinges. Doorknobs are positioned far from the hinges to provide the greatest amount of torque.

Torque Torque is created whenever the line of action of a force does not pass through the axis of rotation. The line of action is an imaginary line in the direction of the force and passing through the point where the force is applied. If the line of action passes through the axis, the torque is zero.

Calculating torque The torque created by a force depends on the strength of the force and also on the lever arm. The lever arm is the perpendicular distance between the line of action of the force and the axis of rotation.

Torque and direction The direction of torque is often drawn with a circular arrow showing how the object would rotate. Positive torque is counterclockwise, and negative torque is clockwise..

Torque and force differ Torque is created by force, but it is not the same thing as force. Torque depends on both force and distance. Torque (N·m) has different units from force (N). The same force can produce any amount of torque depending on where, and in what direction, it is applied.

Torque and force The same force can create different amounts of torque depending on where it is applied and in what direction. Some forces produce no torque.

Net torque If more than one torque acts on an object, the torques combine to equal the net torque. If the torques make an object spin in the same direction, they are added. If the torques make the object spin in opposite directions, the torques are subtracted.

Looking for: … the torque. Calculating torque A force of 50 N is applied to a wrench that is 0.30 m. long. Calculate the torque if the force is applied perpendicular to the wrench. Looking for: … the torque. Given: … the force (50 N) and the length of the lever arm (0.30 m) Relationships: Use: τ = Fr Solution: τ = (0.30 m)(50 N) = 15 N·m

Rotational equilibrium An object is in rotational equilibrium when the net torque applied to it is zero. Rotational equilibrium is often used to determine unknown forces. Any object that is not moving must have a net torque of zero and a net force of zero.

Applying rotational equilibrium Triple beam balances used in schools and scales used in doctors’ offices use balanced torques to measure weight. When using such scales, you must slide small masses away from the axis of rotation until the scale reaches equilibrium. Moving the mass increases its lever arm and its torque.

Architecture: Forces in Equilibrium Four thousand years ago, the builders of the Pyramids of Egypt understood how a structure must be designed to remain standing. Egyptians used trial-and-error along with back-breaking effort to refine their design, keeping ideas that worked and discarding those that didn’t.