Intro to Momentum Conservation of Momentum Impulse Student Experience Students brainstorm the meaning of momentum. Students use different to investigate what the factors are in momentum. Students qualitatively experiment with elastic collisions to construct the conservation of momentum. Teacher leads a demonstration of elastic and inelastic collisions with a Newton’s Pendulum. Students design and carry out an investigation to identify the differences between when a ball is dropped on a book versus a ball dropped on a foam pad. Then, students identify the factors involved in the difference. Students participate in a water balloon toss. They write about how the toss relates to the impulse equation. T4T Material Golf balls. Also needed, ping pong balls and marbles. 1 Clear tube, tube cut in half or some other channel, 1 Golf ball, 1 ping pong ball, 1 marble per group. A Newton’s Pendulum for a demo. One golf ball, a book and a foam pad per group. Additionally, one water balloon per pair. Big Idea Momentum = mass x velocity Momentum in conserved. Elastic and Inelastic collisions have similar but different equations. Ft=Δmv A cushioned landing takes more time. Connection to Culminating Activity Definition and equation of momentum Momentum can be changed. This is the central concept for the Culminating Activity. CA Standards PH2. d; IE1. j PH2. g; IE1. j PH2. f; IE1. j Next Generation Science Standards HS-PS2-2 Asking questions and defining problems. Analyzing and interpreting data. Constructing explanations and designing solutions. HS-PS2-2, 3 Asking questions and defining problems. Analyzing and interpreting data. Constructing explanations and designing solutions. HS-PS2-1 Asking questions and defining problems. Analyzing and interpreting data. Constructing explanations and designing solutions.
Time One 55 min period Two 55 min periods One 55 min period Culminating Activity – Car Safety Engineering Force to Break Egg Test Materials Test The Drop and Write up Student Experience Students are introduced to the Culminating Activity (if not done at the beginning of unit) Students design and carry out a test to determine the force required to break an egg. Students design and carry out a test to determine which material will best help their egg survive. Students design and build a device (vehicle) that minimizes the force on an egg, after the device is dropped from a height to collide with the ground. T4T Material One egg per pair, in a baggie. Mass, spring scales or scales, meter sticks, stop watches. *Water balloons can be used as an alternative. The Cart One egg per pair. The Cart. *Water balloons can be used as an alternative. Big Idea How much force can an egg withstand? Designing a controlled experiment. Thinking about how the testing of materials helps students understand the Impulse Equation better. Ft=Δmv CA Standards ------ ------- PH2. f Next Generation Science Standards HS-PS2-1, 3 Asking questions and defining problems. Analyzing and interpreting data. Constructing explanations and designing solutions. HS-PS2-1, 3 Asking questions and defining problems. Analyzing and interpreting data. Constructing explanations and designing solutions. Engaging in Argument from Evidence HS-PS2-1, 2, 3 Asking questions and defining problems. Analyzing and interpreting data. Constructing explanations and designing solutions. Engaging in Argument from Evidence Time One 55 min period One 55 min period Two 55 min periods