2.2 Notes What is the difference between speed and velocity?

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Presentation transcript:

2.2 Notes What is the difference between speed and velocity? How is the motion of two objects relative to each other described? How can an object’s momentum be calculated? Copyright © McGraw-Hill Education Velocity and Momentum

Velocity Speed describes only how fast something is moving. To determine direction you need to know the velocity. Velocity includes the speed of an object and the direction of its motion. Copyright © McGraw-Hill Education Velocity and Momentum

Relative Motion If you are sitting in a chair reading this sentence, you are moving. You are not moving relative to your desk or your school building, but you are moving relative to the other planets in the solar system and the Sun. Copyright © McGraw-Hill Education Velocity and Momentum

Momentum A moving object has a property called momentum that is related to how much force is needed to change its motion The momentum of an object is the product of its mass and velocity. Copyright © McGraw-Hill Education Velocity and Momentum

Momentum is given the symbol p and can be calculated with the following equation: The unit for momentum is kg · m/s. Notice that momentum has a direction because velocity has a direction. Velocity and Momentum Copyright © McGraw-Hill Education

Add link to concepts in motion animation from page 49 here. FPO Add link to concepts in motion animation from page 49 here. Copyright © McGraw-Hill Education Velocity and Momentum

Review Essential Questions Vocabulary What is the difference between speed and velocity? How is the motion of two objects relative to each other described? How can an object’s momentum be calculated? Vocabulary velocity momentum Copyright © McGraw-Hill Education Velocity and Momentum