2 Velocity and acceleration 04 January 2016 CarriagewaysCarsVans Local roads Single carriageway Dual carriageway Motorways towing a trailer Know your limit!

Slides:

Advertisements

Similar presentations

I have to solve for WHAT? Kinematics Equations.

Advertisements

Unit 2-3: Vectors, Velocity, and Acceleration

Noadswood Science,  To understand acceleration and velocity-time graphs Wednesday, April 29, 2015.

Area under a velocity-time graph Car travelling at 70 mph for 2 hours Area = This is the distance travelled, 140 miles 2  70 = 140 v mph t hours

Uniform Motion Speed & Velocity.

$1 Million $500,000 $250,000 $125,000 $64,000 $32,000 $16,000 $8,000 $4,000 $2,000 $1,000 $500 $300 $200 $100 Welcome.

P3a(i) Speed You will learn about:

Today’s Objective We will be able to calculate the speed and velocity of an object in motion by analyzing given data.

Speed, Velocity, and Acceleration

Motion. What Do We Mean By Speed? Exactly how fast are you running? How many meters do you run for each second? Do you always run the same number of meters.

Speed How can I work out the speed of objects? Starter: Man Vs Cheetah ? Who would win a race? DJns#

Linear Motion. Moving things have two different kinds of motion Linear Motion Harmonic Motion Motion is a change in position in a certain amount of time.

Motion ku3b4F5eauE.

Mechanics Unit 5: Motion and Forces 5.6a Linear Motion...

Speed, velocity and acceleration. 1Both Mr Rabbit and Mr Tortoise took the same round trip, but Mr Rabbit slept & returned later.

Distance Vs. Displacement Distance: is how far point A is from point B Displacement: is the distance and direction between starting and ending positions.

Usain Bolt is the world’s fastest man!!!. Physics of Motion We will look at: –Distance –Displacement –Speed First you need to realize that motion is relative…

Motion (Chapter 2). Motion: Can be defined as movement. 1. Motion is everywhere. 2. Example: Car moving, trees swaying, atoms moving to produce heat.

Motion The motion of an object can be measured. The position of an object, its speed, and direction can be represented on a graph. (C.S. 2.1, 3.2)

Motion Movin and Groovin!. Frame of Reference Movement from a fixed point. Movement is relative to a fixed point. Is she moving towards you or away from.

Speed. Do you know how fast you can run? Do you know how fast you can ride your bike? Do you know how fast cars can drive on the street without getting.

Motion and Speed. What is Motion? any physical movement or change in position or place, relative to a reference point Reference Point Movement.

Acceleration & Speed How fast does it go?. Definition of Motion Event that involves a change in the position or location of something.

Projectiles Horizontal Projection Horizontally: Vertically: Vertical acceleration g  9.8 To investigate the motion of a projectile, its horizontal and.

Physics Physics: The study of forces, motion and energy Motion: Change in position over time compared to a reference point Reference Point: object used.

STARTER During a road trip, in 6 hours you travel 300 miles. What is your average velocity? Average Velocity = distance travelled/time taken = 300 miles/6.

Motion, Speed, Velocity and Acceleration. VECTORS AND SCALORS ORIGIN - POINT AT WHICH BOTH VARIABLES ARE AT 0 (ZERO) MAGNITUDE – SIZE VECTORS – DIRECTION.

Distance, Speed and Time

Relationship between time, displacement, velocity, acceleration. Kinematic.

Motion Recognizing, Describing, and Measuring Motion.

 You can use weighted averages to solve uniform motion problems when the objects you are considering are moving at constant rates or speeds.

Physics Force and Motion Test Question Explanations.

2_4 On the Road Look at the data for the BMW 3 Series below. What is the connection between power and acceleration? 10 February 2016 ModelAcceleration.

Sketching Motion Graphs Interpreting Motion Graphs Constant Velocity Acceleration Distance/

Motion in One Dimension. Displacement  x = x f - x i.

Introduction to Mechanics. An Overview of Mechanics Mechanics is the study of motion Kinematics is a subtopic of mechanics dealing with the description.

v- tx-tKinematics Reaction Time Chase.

Chapter 7 Motion & Forces 7.1 Describing Motion 7.2 Forces.

Speed: Average Velocity: Instantaneous Velocity:

Kinematics – Linear Motion Topics Point of Reference Speed – Velocity - Acceleration Free Fall – How Far?, How Fast? Graph of Motion Activities Class.

Speed, Velocity, and Acceleration. Speed Speed: how fast something is moving  Ex 1: A racecar travels at 90 miles per hour (mi/hr)  Ex 2: A runner runs.

Speed, Velocity, Acceleration Test #2 How much distance have you run at 18 m/s for 10 seconds? Distance = Speed x Time 18 m/s x 10 s. = 180 m.

Velocity and Acceleration. Motion What is motion? –A change in the position of an object over time. How do you know something has moved? –You use a reference.

Speed & Velocity Aim: How can we differentiate between speed and velocity?

Speed, Velocity, and Acceleration. Motion What is Motion? Motion is a change in position. Example:

Speed and Velocity.

Speed, Velocity and Acceleration

1-1-4 Kinematics Equations

Speed How fast does it go?.

Speed: measure of the distance an object travels per unit of time Units: m/s, km/h, mph Constant Speed: rate of change of position in which the same.

Speed, Distance, Velocity & Acceleration

Speed, Velocity, and Acceleration

Graphing Motion Walk Around

Real or Ridiculous??!!.

A car is decelerated to 20 m/s in 6 seconds

Recognizing, Describing, and Measuring Motion

#13 Speed and Momentum. #13 Speed and Momentum.

Matter in Motion.

Starter Questions Convert the following to minutes :-

Calculating Speed from a Distance-Time Graph

Speed, velocity and acceleration

Recognizing, Describing, and Measuring Motion

Position, Speed and Velocity

Presentation transcript:

2 Velocity and acceleration 04 January 2016 CarriagewaysCarsVans Local roads Single carriageway Dual carriageway Motorways towing a trailer Know your limit! What are the UK speed limits for cars and vans? Vans between 2000kg and 7500kg.

2 Velocity and acceleration 04 January 2016 CarriagewaysCarsVans Local roadsAs marked Single carriageway roads6050 Dual carriageway roads7060 Motorways70 * towing a trailer* 60 Know your limit! Why do you think vans are lower unless they weigh under 2000kg?

2 Velocity and acceleration What is the difference between speed and acceleration? What is acceleration and what are its units? What is deceleration? 04 January 2016 Motorways and dual carriageways have a central barrier and higher maximum speeds. Why is this safer than a single carriageway at 60mph?

World Records Usain Bolt is the 100m world record holder. Time = 9.58 seconds. What was his average speed for this distance? Speed = Why was this the average speed? What condition(s) would have to be met to make a valid record?

World Records Usain Bolt is the 100m world record holder. Time = 9.58 seconds. What was his average speed for this distance? Speed = distance = 100m = m/s time9.58s Starts at zero and he takes time to reach his maximum speed. Wind speed Track distance Timing system

Velocity = speed in a given direction On a treadmill a speed is set. The belt runs at the speed set. E.g. 3 m/s How fast is the runner running (speed)? How quickly do they move in the direction they are running (velocity)? Velocity tells us how quickly we are travelling in the direction we want to go.

Direction Velocity tells us how quickly we are travelling in the direction we want to go. If we wanted to travel from Nottingham to Donington the A52 is the most direct route. Distance = 48 miles. Time = 1 hour. However, travelling due East is shorter: 40 miles. What is the speed for this journey? What is the velocity due East?

Direction Velocity tells us how quickly we are travelling in the direction we want to go. If we wanted to travel from Nottingham to Donington the A52 is the most direct route. Distance = 48 miles. Time = 1 hour. However, travelling due East is shorter: 40 miles. Average speed for this journey = 48 mph Velocity due East = 40 mph East!

Movement in a circle If an object moves in a circle at a constant speed of 10m/s what is its velocity? A B C D Speed (m/s) Velocity (m/s) A10 B C+10 D10 +

Movement in a circle A B C D Speed (m/s) Velocity (m/s) A10-10 B100 C +10 D100 +

Acceleration = Change in velocity per second Acceleration = change in velocity (m/s) (m/s 2 )Time taken (s) E.g. Rita Queen of speed accelerates from 0 to 30 m/s in 3 seconds. What is its acceleration in m/s 2 ? How can an object accelerate if its speed is constant?

Summary Velocity is speed in a given direction. Acceleration is the change of velocity per second. An object travelling at a constant speed is accelerating if its direction is changing.

Velocity = speed in a given direction On a trip across the Atlantic a plane takes 1 hour longer going west than going east. The air speed is the same for both trips. Why the difference? New YorkLondon 7 hours 8 hours

Velocity = speed in a given direction New YorkLondon 7 hours 8 hours Air speed 540mph Wind 60mph Velocity = 600mph Wind 60mph Velocity = 480mph