REVISION What force keeps the satellite orbiting the Earth.? (1)

Slides:

Advertisements

Similar presentations

P3 – Revision Quiz Space for reflection.

Advertisements

KS4 Kinetic and Potential energy

Explaining Motion Revision. Forces Forces arise from an interaction between 2 objects. Forces arise from an interaction between 2 objects. In an interaction.

Motion Notes 2.

Practice Problem #1 A weightlifter bench presses 80kg (approx. 175lbs.) 0.75m straight up. a. How much work does she do, assuming constant velocity, in.

Time (s)012 Mass of car & bucket (kg) Mass of falling bucket (kg) Force of falling bucket (F = m x a (earth) ) (N) Acceleration of the system ( F = m.

Energy Problems Review for Potential energy, Kinetic energy, Total Energy work, power.

LESSON 3 – KE and PE (4.2) LEARNING OUTCOMES: State and be able to use the equation: change in gravitational potential energy (PE) = mass (m) x gravitational.

P3 Spaced learning Forces for transport. Speed Speed = Average Distance/Time KM x 1000 = M M / 1000 = KM Average Speed Cameras Takes two photos, a certain.

Terminal Velocity D. Crowley, 2008.

Part 4 Newton’s Second Law of Motion Newton’s Second Law Acceleration is the rate at which your velocity (speed with direction) changes.

Tuesday, September 29, 2009 In olden days, something was only considered “doing work” if you were getting tired or sweaty doing it. Make up a definition.

Energy can change from one form to another without a net loss or gain.

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

DYNAMICS Worked Example 4 – Pushing Blocks. 56 N acts on 3 blocks as shown. A 7 kg B 14 kg C 7 kg 56 N Each block experiences 6 N of friction. a) Calculate.

Work and Energy: Jeopardy Review Game $2 $5 $10 $20 $1 $2 $5 $10 $1 $2 $5 $10 $1 $2 $5 $20 $5 $1 Kinetic Energy Potential Energy MachinesWork and Power.

Forces LO:. Force and acceleration If the forces acting on an object are unbalanced then the object will accelerate, like these wrestlers: Force (in N)

Second Law of Motion Newton’s Second Law Mrs. Gergel.

Sect. 8-7: Gravitational Potential Energy & Escape Velocity.

Sub title Potential Energy Work Work- Energy Theorem Kinetic Energy Power 200 Work-Power-Energy.

Warm up 1) How much energy does a 45 kg rock have when it is at the top of a 70 m cliff? 2) How much energy does a 20 kg tricycle have when it is moving.

REVISION What two parts make up the stopping distance of a vehicle?

You can use distance–time graphs to calculate speed / acceleration. The steeper the gradient, the slower / faster the speed / acceleration. You can use.

Chapter 2.2 Objectives and Vocabulary acceleration deceleration Newton's second law Define and calculate acceleration. Explain the relationship between.

Review for Energy Exam. What is the work required for 60 kg astronaut to lift herself 0.2 m on Earth 0.2 m Ans. 120 J.

V P Power, force and velocity Power is the rate at which a force does work. The SI unit of power is the watt (W) 1 W is the rate f working of 1 J s -1.

P3 e-h LO - To consolidate your knowledge of the topic.

Kinetic and Potential Energy UCR MESA. What is Energy? What does it mean if you have a lot of energy? For students it means you can run around, lift weights.

Acceleration The rate at which velocity changes. Includes: increasing speed decreasing speed changing direction (with no change in velocity)

Work – Power Questions – 1 If A and B are both the same height, Do they have the same amount of Potential Energy?

Speeding up and slowing down f = ma Terminal velocity.

Newton’s Second Law Pages Describe your acceleration if you are in a circular motion. What is the net force of your motion? You are constantly.

PENDULUM WORKSHEET 1 is where PE is the greatest

Chapter8: Conservation of Energy 8-7 Gravitational Potential Energy and Escape Velocity 8-8 Power HW6: Chapter 9: Pb. 10, Pb. 25, Pb. 35, Pb. 50, Pb. 56,

Energy Review: Chapter 5 Section 1, Pages Kinetic Energy (KE) Energy of _________________________________________ If an object is ___________________________.

P2 Calculations. What is the acceleration of the bike ? 500 N 100 N Mass = 200kg F = m x a 400 = 200 x a 400 = a 200 2m/s 2 = a.

What are GPE and KE and how do I use the equations?

Conceptual Physics DOUBLE JEOPARDY Mechanics.

1) How is stopping distance calculated?

Gravitational energy Any object in a gravitational field has gravitational potential energy due to its position in that field. The _____ has gravitational.

Mechanical Energy -Potential & Kinetic Energy

Chapter 9:1 What is Energy?

Terminal Velocity D. Crowley, 2008.

1a i) KE = ½ x mass x speed2 1a i)

Let’s Play! Please listen carefully and think before answering.

Forces Revision Newton’s First Law.

Kinetic and Potential Energy

April 8, 2009 What is the potential energy in the following situations: 4 kg object at a height of 6 m 4 N object at a height of 6 m Fill in the blanks:

Kinetic and Potential Energy

What is “weightlessness?”

April 7, 2009 Study for 5 min for your quiz.

Work, potential and kinetic energy

Speeding up and slowing down - Answers

Solution... Click for answers.

PE, KE Examples Answers 1. A shotput has a mass of 7.0 kg. Find the potential energy of a shotput raised to a height of 1.8 m. m = 7.0 kg h.

Chapter 7 Preview Multiple Choice Short Response Extended Response

Speeding up and slowing down

Terminal Velocity D. Crowley, 2008.

Group 1 Group 2 Group 3 Group 4 61 m 35 m 52 m 35 m 63 m 40 m 54 m

Objectives Define work in terms of energy.

Revision Quiz Bowl Units and Measurement

QOD 97 Explain what it means when an object accelerates at a rate of 2 m/s2? When an object accelerates at a rate of 2 m/s2 it means that every second,

Energy #1 1. What’s the PE of a kg rock located at a height of 8.4m above the floor? 2. How much work did it take to raise the rock to that height?

Group 1 Group 2 Group 3 Group 4 61 m 35 m 52 m 35 m 63 m 40 m 54 m

Work, energy and power.

(a) Find the PE at A PE = m g h = ( 500 kg )( 9.8 m/s2 )( 30 m )

Presentation transcript:

REVISION

What force keeps the satellite orbiting the Earth.? (1)

Why is the Moon’s speed constant but it's velocity changing (2)

Calculate the work done climbing the stairs (explain your answer) Weight = 50 N Height 3 m

A lift goes up two floors, each 3m high in 10 seconds Calculate the power. Load = 2000N

Will the car speed up / slow down / or travel at constant speed ? (1) 600 N

How does the speed of falling objects change as they fall? (2)?

Name two advantages of hybrid cars over cars with only petrol engines

Will the car speed up / slow down / or travel at constant speed ? (1) 750 N600 N

B A C D Where is PE increasing ?

Describe how the forces change during a fall (before the parachute opens) (3)

B A C D Where is KE increasing and PE decreasing ?

Explain how air bags reduce accidents? (3)

Explain how ABS works.

B A C D Where as the car got the most KE – Explain your answer ?

Some cars run on biofuel. Name an advantage and disadvantage of this fuel and what type of emissions does it reduce? ?

What will the effect of doubling the mass of a vehicle have on its KE and what will the effect of doubling its speed have? 2000 Kg 4000kg 10 m/s 20 m/s

Both have the same engine and mass. So why does the car use less petrol if driven in the same manner