Slides:

Advertisements

Similar presentations

Newton’s Laws Review.

Advertisements

Forces and Newton’s Laws of Motion

An airplane has a mass of 3

Applications of Newton’s Laws

Please Compute… A man cleaning a floor pulls a vacuum cleaner with a force of magnitude 50 N at an angle of 30 degrees to the horizontal. Calculate the.

Chapter 5 Energy 1. Dot product of vectors 2. Kinetic Energy 3. Potential Energy 4. Work-Energy Theorem 5. Conservative and non-conservative forces 6.

PHY101 Quiz #2, 2012.

© 2012 Pearson Education, Inc. Q6.1 A. The cable does positive work on the elevator, and the elevator does positive work on the cable. v Motor Cable Elevator.

AP Physics I.C Work, Energy and Power.

a) The kinetic energy of the car. b) The distance it takes to stop.

Phy100: More on Energy conservation Mechanical energy (review); Goals: Work done by external forces; Understand conservation law for isolated systems.

Newton’s 2 nd Law Of Motion By Mr. Yum. Newton’s 2 nd Law Newton’s 2 nd Law is defined as: Newton’s 2 nd Law is defined as: F = m x a Where, F = force,

Chapter 4 Forces and Mass.

Physics 151 Week 9 Day 3 Topics: Forces, Apparent Weight, & Friction  Apparent Weight  Friction  Static Friction  Kinetic Friction  Coefficient of.

Newton’s 3rd Law of Motion By: Heather Britton. Newton’s 3rd Law of Motion Newton’s 3rd Law of Motion states Whenever one object exerts a force on a second.

1a. Positive and negative work

Weight is a force that is defined from the gravitational attraction between two masses. The gravitational force causes the less massive object to accelerate.

Chapter 5 Force and Motion

1 A student raises one end of a board slowly, where a block lies. The block starts to move when the angle is 30º. The static friction coefficient between.

A 6. 0-kg object undergoes an acceleration of 2. 0 m/s2

Nahdir Austin Honors Physics Period 2.  Force: A push or pull on an object (something that can accelerate objects.  A force is measured by a Newton.

EVERY-DAY FORCES Force of gravity Normal force Force of friction Universal force of gravity.

FORCES AND LAWS OF MOTION. FORCE (push) (pull) Examples of forces: ContactField Pulling the handle of the door Pushing a stroller Hitting a tennis ball.

Chapter 5 Newton’s Second Law of Motion – Force and Acceleration

Halliday/Resnick/Walker Fundamentals of Physics 8th edition

Types of Forces Force – An interaction between two objects resulting in a push or a pull.

Kinetic Energy A moving object has energy because of its motion. This energy is called kinetic energy.

Chapter 7. Kinetic Energy and Work

Newton’s Second Law of Motion. Force and Acceleration Force is a push or a pull acting on an object. Acceleration occurs when the VELOCITY of an object.

Potential Energy and Conservative Forces

Chapter 4 Forces and the Laws of Motion. Newton’s First Law An object at rest remains at rest, and an object in motion continues in motion with constant.

The Magnetic Field The force on a charge q moving with a velocity The magnitude of the force.

Chapter 7 Rotational Motion and the Law of Gravity

Notes Force. Force is a push or pull exerted on some object. Forces cause changes in velocity. The SI unit for force is the Newton. 1 Newton = 1 kg m/s.

4-4: Everyday Forces Objectives: Explain the difference between mass and weight Find the direction and magnitude of the normal force Describe air resistance.

Exploring Frictional Forces Friction Friction and Newton’s Laws Static and Kinetic Friction Coefficient of Friction Practice.

AP Physics C I.B Newton’s Laws of Motion. The “natural state” of an object.

Physics Sem. 2 Final Review

Energy Examples Serway and Jewett 8.1 – 8.3 Physics 1D03 - Lecture 22.

Friction Ffriction = μFNormal.

Friction What is friction?. Answer Me!!! Think of two factors that affect friction.

Newton’s Second Law of Motion – Force & Acceleration

AP Physics C I.B Newton’s Laws of Motion. Note: the net force is the sum of the forces acting on an object, as well as ma.

The tendency of objects to resist change in their state of motion is called inertia  Inertia is measured quantitatively by the object's mass.  Objects.

Chapter 3 Newton’s Laws Practice Exercise Solutions.

Force Fields Objective: TSW understand and apply the concept of a force field by calculating the field, the force and motion of a particle in a field.

1. Work [W] = N*m = J Units: Work done by forces that oppose the direction of motion will be negative. Work and energy A. PositiveB. NegativeC. Zero Example:

Coefficient of Friction The force of friction is directly proportional to the normal force. When we increase the mass or acceleration of an object we also.

 Friction – force that opposes motion  Caused by microscopic irregularities of a surface  The friction force is the force exerted by a surface as an.

Work Readings: Chapter 11.

CHAPTER 8 REVIEW MS. PAREKH. WHAT IS A REFERENCE POINT? IT IS THE STARTING POINT USED TO LOCATE ANOTHER PLACE OR THING.

Conservation of Energy

Work, Energy and Power Ms Houts AP Physics C Chapters 7 & 8.

FORCE = Any push or pull which causes something to move or change its speed or direction.

Test #3 Notes Forces and the Laws of Motion Circular Motion and Gravitation Chapters 4 and 7.

Forces and Newton’s Laws of Motion. A force is a push or a pull. Arrows are used to represent forces. The length of the arrow is proportional to the magnitude.

An 7.3-kg object rests on the floor of an elevator which is accelerating downward at a rate of 1.0 m/s 2. What is the magnitude of the force the object.

Physics Fall Practice Final Exam 25 Questions Time = Less than 30 minutes.

N EWTON ’ S L AWS T EST R EVIEW. I F A MASS FEELS A FORCE, IT ALSO EXPERIENCES AN ACCELERATION. I F THE MASS WERE TO DOUBLE, WHILE KEEPING A CONSTANT.

Review for Forces Test. Describe an objects velocity and acceleration when the net force is zero? Describe an objects velocity and acceleration.

NEWTON'S LAWS OF MOTION Philosophiae Naturalis Principia Mathematica (1686)

Work – in the physics sense of the word

Work of a constant force Scalar product between vectors

Static Friction: no surface motion.

2nd Law Questions An object is propelled along a straight-line path by a force. If the net force were doubled, its acceleration would Quadruple Double.

Newton’s Laws.

In your Journals: Quickwrite on Forces

Entrance and Exit Slip Questions

Presentation transcript:

A block of mass 2.50 kg is pushed 2.20 m along a frictionless horizontal table by a constant 16.0-N force directed 25.0  below the horizontal. Determine the work done on the block by (a)the applied force, (b)(b) the normal force exerted by the table, and (c)(c) the gravitational force. (d) (d) Determine the total work done on the block.

The force acting on a particle varies. Find the work done by the force on the particle as it moves (a) from x = 0 to x = 8.00 m, (b) from x = 8.00 m to x = 10.0 m, and (c) from x = 0 to x = 10.0 m

A kg particle has a speed of 2.00 m/s at point A and kinetic energy of 7.50 J at point B. What is (a)its kinetic energy at A? (b)(b) its speed at B? (c)(c) the total work done on the particle as it moves from A to B?

The electric motor of a model train accelerates the train from rest to m/s in 21.0 ms. The total mass of the train is 875 g. Find the average power delivered to the train during the acceleration.

True or false: (a) If the net or total work done on a particle was not zero, then its speed must have changed. (b) If the net or total work done on a particle was not zero, then its velocity must have changed.

(c) If the net or total work done on a particle was not zero, then its direction of motion could not have changed. (d) No work is done by the forces acting on a particle if it remains at rest. (e) A force that is always perpendicular to the velocity of a particle never does work on the particle.

Give an example of a particle that has constant kinetic energy but is accelerating. Can a non-accelerating particle have a changing kinetic energy? If so, give an example.

True or false: (a) The gravitational force cannot do work on an object,because it is not a contact force. (b) Static friction can never do work on an object. (c) As a negatively charged electron is removed from a positively charged nucleus, the force on the electron does work that as a positive value.

d) If a particle is moving along a circular path, the total work being done on it is necessarily zero. By what factor does the kinetic energy of a particle change if its speed is doubled but its mass is cut in half?