Chapter 11 Rotational Mechanics.

Slides:

Advertisements

Similar presentations

Angular Quantities Correspondence between linear and rotational quantities:

Advertisements

Chapter 9 Objectives Calculate the torque created by a force.

It will accelerate in a spin!

Torque and Rotation Physics.

Circular Motion. Which horse on a merry-go-round moves faster… One on the outside rail One near the inside rail?

Foundations of Physics

Chapter 9: Torque and Rotation

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.

Translational vs. rotational motion  Translational Motion  What we talked about in earlier units  Motion of the center of mass  Rotational Motion 

Chapter 8 Rotational Equilibrium and Rotational Dynamics.

Rotational Motion. Difference between torque and force If you want to make an object move, apply a force If you want to make an object rotate, apply a.

Warm Up Ch. 9 & 10 1.What is the relationship between period and frequency? (define and include formulas) 2.If an object rotates at 0.5 Hz. What is the.

Torques produce rotation in the same way that forces produce motion. HOMEWORK: Read Pg Answer Pg 165 # 7 – 12 Pg 166 (Plug and Chug Questions)

Ch. 11 Rotational Mechanics Torque. TORQUE n Produced when a force is applied with leverage. n Force produces acceleration. n Torque produces rotation.

Rotational Inertia and Angular Momentum. Inertia The resistance of an object to change its state of motion Depends on mass (the bigger the mass, the bigger.

Rotational Mechanics.

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 Mechanics Center of Gravity The point located at the object’s average position of weight.

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. 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.

 Point at which all other points on the object rotate around  During motion the CM will move in the same path that a simple particle would move if subjected.

Chapter 11 Rotational Mechanics. Torque If you want to make an object move, apply a force. If you want to make an object rotate, apply a torque. Torque.

Chapter 11 Rotational Mechanics Rotational Inertia n An object rotating about an axis tends to remain rotating unless interfered with by some external.

ROTATIONAL MOTION.

Physics 1210/1310 Mechanics& Thermodynamics Thermodynamics Lecture R1-7 Rotational Motion.

Cheyanne Rimer, Jeremy Massari, William Ortiz, Jordan Cooper, and Duncan Godsey Rotational Mechanics.

Chapter 9: Rotational Dynamics

Torque Chap 8 Units: m N 2.

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.

CP Physics Chapter 8 Rotational Dynamics. Torque --Torque is the quantity that measures the ability of a force to rotate an object around some axis.

Concept Summary Belton High School Physics. Circular Motion Terms The point or line that is the center of the circle is the axis of rotation.The point.

Rotational Motion. Deg, Rad, Grad There are 360 degrees in one rotation of a circe. There are 2π radians in one rotation of a circle. There are 400 gradians.

Notes on Chapter Center of Gravity & Rotational Mechanics

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 MECHANICS And the fun continues…. A torque is produced when a force is applied with “leverage.” – Ex. You use leverage when you pull a nail.

Chapter 11 Rotational Mechanics. Recall: If you want an object to move, you apply a FORCE.

8.2 Rotational Dynamics How do you get a ruler to spin on the end of a pencil? Apply a force perpendicular to the ruler. The ruler is the lever arm How.

Circular Motion, Center of Gravity, & Rotational Mechanics

Chapter 9 Rotational Dynamics

Rotational Dynamics Rode, Kiana, Tiana, and Celina.

Rotational Mechanics. Torque When you want an object to turn or rotate, you apply a torque. Torques produce rotation.

Rotational Equilibrium and Dynamics Russ Ballard Kentlake Science Department.

CP Physics Chapter 8 Rotational Dynamics. Torque --Torque is the quantity that measures the ability of a force to rotate an object around some axis.

Torque & Rotational Motion. Center of Mass Average location of an object’s mass.

TORQUE A torque is an action that causes objects to rotate. Torque is not the same thing as force. For rotational motion, the torque is what is most directly.

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 & Center of Gravity

Rotational Motion.

AP Physics Review Rotational Motion.

Ch 8 : Rotational Motion .

CONCEPTUAL PHYSICS Rotational Mechanics.

PHY 131 Chapter 8-Part 1.

Rotational Motion.

Rotational Inertia and Torque

Rotational Mechanics.

Rotational Dynamics Chapter 9.

Ch. 8 Rotational Motion.

Part II – Torque & Simple Machines

CH-8: Rotational Motion

CH-8: Rotational Motion

Foundations of Physics

Objectives Calculate the torque created by a force.

Torque A torque (due to a force) causes angular acceleration.

Bell Work: Centripetal Motion

Collisions at an Angle The total momentum of the two football players prior to the collision is the vector sum of their individual momentums. The larger.

9.1 Torque Key Question: How does force create rotation?

Presentation transcript:

Chapter 11 Rotational Mechanics

Torque Force produces acceleration Torque produces rotation Torque = f x l (lever arm) Only forces perpendicular to the lever arm contribute to torque Units: N·m

Torque

Torque Examples: Prying a lid off a can w/ a screwdriver turning a nut w/ a wrench opening a door doorknob at the edge vs. doorknob at the center

Balanced Torques Examples: Seesaw f L = F l ex: Where would a 600 N boy have to sit in order to balance a 200 N girl who sits 3 m from the fulcrum?

Balanced Torques Examples: Scale Balances ex: Suppose that a meterstick is supported at the center, and a 20 N block is hung at 80 cm. Another block of unknown weight balances the system at the 10 cm mark. What is the weight of the second block?

Torque and CG When your base is not below your cg, there is a torque. Force is required to launch any projectile If the direction of force is through the cg, the force moves the object as a whole

Torque and CG If the force is off center, the object will rotate about its cg

Rotational Inertia An object rotating about an axis tends to keep rotating about that axis Resistance to changes in its rotational motion

Rotational Inertia Forces change linear motion Torques change rotational motion Depends on mass and its distribution greater the distance between mass and axis, greater rotational inertia

Angular Momentum Linear Momentum = inertia of motion ρ = mv Angular Momentum = inertia of rotation*velocity mvr (radius-how far from the center is the mass)

Conservation ofAngular Momentum Ice Skater arms tucked in = arms extended mrV = mRv