Year 10 Physics Learning Cycle 2 Overview How objects behave can always be predicted Learning Cycle Overview: Line of enquiry 1: Hypothesis 1 Hypothesis 2 How do objects fall? Falling objects travel with a constant velocity An objects terminal velocity is dependent on its weight Line of enquiry 2: Hypothesis 3 Hypothesis 4 How do objects stretch? Forces can only change the velocity of objects A springs stretch is dependent on the force applied Line of enquiry 3: Hypothesis 5 Hypothesis 6 Hypothesis 7 Hypothesis 8 How can forces and energy be linked? Work done is a measure of energy Gravitational potential energy is easily destroyed Momentum makes objects easier to stop Momentum is conserved Week 1 Week 1 Week 1/2 Year 10 Physics | Learning Cycle 2 | Medium Term Plan | Science 2015/16 How objects behave can always be predicted Line of enquiry one: How do objects fall? Intentions for learning from AQA GCSE specification: In this line of enquiry pupils: The faster an object moves through a fluid the greater the frictional force that acts on it. An object falling through a fluid will initially accelerate due to the force of gravity. Eventually the resultant force will be zero and the object will move at its terminal velocity (steady speed). Draw and interpret velocity-time graphs for objects that reach terminal velocity, including a consideration of the forces acting on the object. Calculate the weight of an object using the force exerted on it by a gravitational force Lesson 1: Falling objects travel with a constant velocity Lesson 2: An objects terminal velocity is dependent on its weight Key words: terminal velocity, velocity, constant, resultant Key words: weight, mass, gravitational force, Learning Intentions: Students should develop an understanding that: Frictional forces increase with velocity Terminal velocity is maximum constant velocity reached by a falling object Learning Intentions: Students should develop an understanding that: Weight is a measurement that can be calculate using mass and gravitational pull Intentions for learning from AQA GCSE specification: In this line of enquiry pupils: A force acting on an object may cause a change in shape of the object. A force applied to an elastic object such as a spring will result in the object stretching and storing elastic potential energy. For an object that is able to recover its original shape, elastic potential energy is stored in the object when work is done on the object to change its shape. The extension of an elastic object is directly proportional to the force applied, provided that the limit of proportionality is not exceeded Lesson 3: Forces can only change the velocity of objects Lesson 4: A springs stretch is dependent on the force applied Key words: elastic, stretch, elastic potential energy Key words: directly proportional, limit of proportionality, Learning Intentions: Students should develop an understanding that: Forces can change the shape of elastic objects Stretchy objects contain elastic potential energy Learning Intentions: Students should develop an understanding that: Extension of an elastic object is directly proportional to the force applied to the object Success Criteria: Recall what the term elastic means Describe the effect of a force on elastic objects Explain why elastic objects change shape rather than break Evaluate the hypothesis Success Criteria: Describe what is meant by a directly proportional relationship Investigate how spring extension changes with increasing force Draw a graph of results Evaluate the hypothesis Success Criteria: Describe how velocity changes for falling objects Draw this change in velocity on a velocity time graph Explain why this velocity change happens Evaluate the hypothesis Success Criteria: Describe what is meant by the term weight Use the definition to create a mathematical formula Apply the weight equation to questions Predict how weight would affect terminal velocity Evaluate the hypothesis Line of enquiry two: How do objects stretch? Year 10 Physics | Learning Cycle 2 | Medium Term Plan | Science 2015/16 How objects behave can always be predicted Line of enquiry three: How can forces and energy be linked? Intentions for learning from AQA GCSE specification: In this line of enquiry pupils: When a force causes an object to move through a distance work is done. Work done, force and distance are related Energy is transferred when work is done. Work done against frictional forces. Power is the work done or energy transferred in a given time. Gravitational potential energy is the energy that an object has by virtue of its position in a gravitational field. The kinetic energy of an object depends on its mass and its speed. Momentum is a property of moving objects. In a closed system the total momentum before an event is equal to the total momentum after the event; this is called conservation of momentum. Lesson 5: Work done is a measure of energy Lesson 6: Gravitational potential energy is easily destroyed Key words: work done, transferred, Key words: x, x, x Learning Intentions: Students should develop an understanding that: Work done is a measurement of energy transferred Work done can be calculated using force and distance Learning Intentions: Students should develop an understanding that: Energy cannot be created or destroyed Kinetic energy can be calculating using mass and velocity Gravitational potential energy can be calculated using mass, gravitational field strength and height Lesson 7: Momentum makes objects easier to stop Lesson 8: Momentum is conserved Key words: momentum Key words: conserved, closed system, Learning Intentions: Students should develop an understanding that: Momentum is a measurement of how hard it is to stop a moving object Learning Intentions: Students should develop an understanding that: Momentum is conserved in a closed system Success Criteria: Predict what characteristics of a moving object would make it harder to stop Describe what is meant by the term momentum Create a mathematical equation for momentum Apply equation to exam style questions Success Criteria: Predict how distance travelled effects the amount of energy used by an object Predict how force applied effects the amount of energy used by an object Use these predictions to create an equation for work done Success Criteria: Describe what is meant by a closed system Calculate the momentum before and after a collision for a range of objects Evaluate how the total momentum of a system changes. Success Criteria: Predict which objects would have the most kinetic / gravitational potential energy Describe what is meant by the key words Use the equation to calculate the amount of energy in falling objects Describe the energy transfers for falling objects