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© Boardworks Ltd 2003 Force mass and acceleration
© Boardworks Ltd 2003 Force mass and acceleration Recall and use the relation between force, mass and acceleration (including the direction). Describe, qualitatively, motion in a curved path due to a perpendicular force.
© Boardworks Ltd 2003 How are mass, force and acceleration related? Two masses of 1 kg and 4 kg are both subject to the same force, which one will accelerate the fastest? The lower the mass, the greater the acceleration for a specific force. This is why Grand Prix cars get faster as they use up their fuel. Less fuel, means less mass, less mass means greater acceleration.
© Boardworks Ltd 2003 F=ma We can express the relationship between force, mass and acceleration using the equation: Force = mass x acceleration F =ma Force measured in Newtons (N) Mass measured in kilograms (kg) Acceleration measured in metres per second per second (ms -2 )
© Boardworks Ltd 2003 Formula triangles F m aa x Formula triangles help you to rearrange formula. The triangle for the f=ma formula is shown below: Whatever quantity you are trying to find, cover it up and it will leave you with the calculation required. So if you were trying to find mass, m….. …you would cover m up… …and you are left with the sum… m = F a
© Boardworks Ltd 2003 Force calculations: 1.What force will make a mass of 4 kg accelerate at 5 ms -2 ? 2.A force of 50N acts on a 2 kg mass. What will be the acceleration of the mass? 3.A force of 2 000N accelerates a car at 2.5 ms -2. What is the mass of the car? Force = 20 N Acceleration = 25 ms -2 Mass = 800 kg
© Boardworks Ltd 2003 Force questions: 1.Label the forces acting upon a moving bike. 2.Fill in the table: A > (C+D)A =(C+D) A < (C+D) Bike accelerating Bike at steady speed Bike decelerating A B C D E A - Thrust B - Reaction C – Air resistance D - Friction E - Gravity
© Boardworks Ltd 2003 Moving in circles Watch the bucket demonstration Draw a force diagram of: The bucket The water
© Boardworks Ltd 2003 Questions (Assuming the bucket travels at a constant speed) What is the change in speed? What is the change in velocity? What is the definition of velocity? What is the definition of acceleration? Is the bucket accelerating?
© Boardworks Ltd 2003 Applet http://phet.colorado.edu/en/simulation/ motion-2dhttp://phet.colorado.edu/en/simulation/ motion-2d
© Boardworks Ltd 2003 Notes F=ma (acceleration is always in the direction of the force) Any change in velocity is an acceleration……. …… including changes in direction. An object moving in a circle at constant speed is accelerating.
How are mass, force and acceleration related? Two masses of 1 kg and 4 kg are both subject to the same force, which one will accelerate the fastest? The.
StartingTask As a pair consider how to test the relationships between either: force and acceleration mass and acceleration force and direction What do.
1 of 8© Boardworks Ltd of 8© Boardworks Ltd 2008 If the ending force acting on an object is not zero, all the forces are said to be unbalanced.
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© Boardworks Ltd 2003 KS4 Further Forces. © Boardworks Ltd 2003 A slide contains teacher’s notes wherever this icon is displayed - To access these notes.
© Boardworks Ltd 2003 KS4 Forces – Speed and Acceleration.
Motions and Forces. How is speed calculated? The speed of an object can be calculated using this equation: distance travelled time taken speed =
PHYSICS Revision Lesson 5 Velocity and Acceleration Distance-Time and Speed-Time Graphs.
Chapter 2.2 Objectives and Vocabulary acceleration deceleration Newton's second law Define and calculate acceleration. Explain the relationship between.
Key Concepts What is Newton’s first law of motion? What is Newton’s second law of motion? Key Terms - Inertia.
Force and motion Objectives When you have competed it, you should * understands Newton’s first law of motion * know some different types of forces * know.
© Boardworks Ltd 2003 IGCSE Electricity – Resistance.
© Boardworks Ltd of 20 © Boardworks Ltd of 32 KS4 Physics Speed and Acceleration.
© SSER Ltd. Physics ( ) Newton’s Laws. Force Force is a vector quantity, so it has magnitude and direction. A force is a pulling or pushing effect.
1 of 8© Boardworks Ltd 2008 Motion How do you know when something is moving? Objects must be compared to a “reference point”, something that is not moving.
REVISION What two parts make up the stopping distance of a vehicle?
Factors that Affect a Force While riding your bike, when would you find yourself pedaling really hard? Some ideas: when you want to go faster, when.
Bell Work What is one thing you would like to know about how to graph data? Adapted from :www.jkcc.org.uk/Science%20revision/Physics%20Revision%20Lesson%20.
Newton’s Second Law can be expressed with an equation: Which can be re-arranged to isolate Force like this:
Warm Up. Two blocks of mass m = 2 kg and M = 5 kg are hanging off a single pulley, as shown. Determine the acceleration of the blocks. Ignore the mass.
The Law of Inertia. Objects at rest remain at rest unless acted upon by an outside force. Objects in motion will remain in motion unless acted upon by.
Physics 151 Week 4 Day 2 Topics –Motion Graphs –Area under a curve (velocity to position) –Constant acceleration equations.
© Boardworks Ltd 2003 The Wave Equation. © Boardworks Ltd 2003 Crest / Peak Time Trough a a Displacement + Waves : Reminder TRANSVERSE WAVES.
MS. MORGAN Force. What is a Force? Something that changes the state of rest or the state of motion of an object. Can be a…. push or a pull Unit of measurement:
Pressure. Pressure in solids Core Relate (without calculation) pressure to force and area, using appropriate examples Extension Recall and use the equation.
Week. Student will: centripetal accelerationcentripetal force Solve problems involving centripetal acceleration and centripetal force.
Force. Something that changes the state of rest or the state of motion of an object. Can be a push or a pull Unit of measure Newtons N.
Uniform Circular Motion. Answer Me!!!! Newton’s Laws state that an object in motion will stay at the same velocity until acted upon by an unbalanced.
Dynamics Kinematics: the study of HOW objects move Dynamics: the study of WHY objects move the way they do ◦ Force any push or pull on an object Vector.
4-4: Everyday Forces Objectives: Explain the difference between mass and weight Find the direction and magnitude of the normal force Describe air resistance.
KEY WORDS: Velocity Acceleration Deceleration Speed ASSESSMENT: P2 REVISION – CHAPTER 1 – Motion Distance-time Graphs The gradient of the line on a distance-time.
QUESTION 1: A 1500 kilogram drag racing car sits at the start line. The race begins and lasts 15.2 seconds. At the point that the drag racing car crossed.
Newton’s Laws 10min test q1 Motion direction pull Weight (force due to gravity – don’t just say ‘gravity’) Friction (opposite to the motion) Contact force.
Motion Revision Quiz questions. Round 1 1.Which of the following is a scalar measurement? displacement distance velocity.
What is force? (In scientific terms) What types of forces make objects move faster, slower, or stop? Identify forces of motion Identify Newton’s laws.
Force and Motion December 2014 Benchmark Review. Formula Triangle F=ma F=ma m=F/a a=F/m Use your finger to cover the value you are looking for. If the.
1. Draw a free body diagram (all the forces) acting on a water skier being pulled by a boat. 2. What is the net force acting on this object? 5 N 1.
Chapter Four Notes: Newton’s Second Law of Motion – Linear Motion.
IPC – Unit 2 Newton’s Laws. Newton’s Laws of Motion Forces change the motion of an object in very specific ways Sir Isaac Newton ( ) was able.
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1 of 10© Boardworks Ltd of 10© Boardworks Ltd 2009 Kinetic energy is the energy an object has because it is moving. What is kinetic energy? The.
WHAT IS MOTION? HOW DO WE DESCRIBE MOTION? Unit 2 - Kinematics SP1. Students will analyze the relationships between force, mass, gravity, and the motion.
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Newton’s 2 nd Law of Motion F = ma. Second Law of Motion This law states the net force of an object is equal to its mass times acceleration The equation.
The stretch of the spring is a measure of the applied force.
B1.8 - Braking Chapter B1. Factors Affecting Braking Reaction distance is affected most by the person driving the car. Braking distance is affected by.
Air resistance is a form of friction that acts to slow down any object moving in the air. Air resistance is a force that gets larger as an object moves.
Newton’s Second Law of Motion Chapter 3 Section 1.
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