What happens when objects collide? How can we design a crash protection device to absorb enough energy during a car crash to save lives?
- Do Now– Get out your science notebook and open to p.61. Look over your observations of the two collisions in the T-chart. Turn to your partner and discuss what could be causing the differences that you observed between the two crashes.
- Field Assignment- Performing Crash Tests- Create two line graphs on graph paper from the velocity vs time data for the two car crashes in the videos. Label the x-axis as “time” and the y-axis as “velocity.” Use the graphs to describe what each car is doing during the particular time intervals and record on your graph paper. On the handout, calculate the acceleration for each car during those time intervals. Using the graph, determine the time of impact for each car. Calculate the momentum of each car at the moment of impact assuming both cars have a mass of 1,500 kg.
- Putting Pieces Together– Take stock- Identify and consolidate ideas you have figured out across your investigations about motion. Put pieces together- Come to a consensus on how the pieces explain what happens when objects collide. Develop a public representation of how the pieces fit together.
How do different factors affect an object’s speed? How does an object’s speed affect its impact?
- Do Now– Copy down your Home Learning task in your planner. Get out your science notebook and open to page 55. Read your definition of a reference point. Write your name on your paper and answer: What reference point would you have to use to be moving right now while you sit in your seat?
- Investigation– Calculating Speed and Determining Velocity- Observe a collision into a barrier on the demonstration track. Finish graphing your data. Answer all of the lab questions, including Reflect and Apply. What pieces of the puzzle did we figure out?
- Driving Question Summary Table– Complete the DQST on ISN pgs. 50-51 for the Calculating Speed and Determining Velocity lab.
Complete the questions on the Calculating Speed Lab
How do the vibrations of the different sounds compare for higher vs lower pitch notes?
- Do Now- Read This Brainteaser … bet you CAN!The phaonmneel pweor of the hmuan mnid: I cdnuolt blveiee taht I cluod aulaclty uesdnatnrd waht I was rdgnieg. Aoccdrnig to a rscheearcr at Cmagbride Uinervtisy, it deosn’t mttaer in waht oredr the ltteers of a wrod are, the olny iprmoatnt tihng is taht the frist and lsat ltteer be in the rghit pclae. The rset can be a taotl mses and you can sitll raed it wouthit a porbelm. Tihs is bcuseae the huamn mnid deos not raed ervey lteter by istlef, but the wrod as a wlohe. Amzanig huh?
- Snowball Discussion/Student Graph Analysis– Each problem was worked out on your own. On a long paper, do out the problem that you’ve been assigned. (Seat 1- problem 1, seat 2- problem 2, seat 3- problem 3, seat 4- problem 4) Now pair together and share your ideas/show your problem. (seat 1 and seat 2; seat 3 and seat 4). Finally, share your ideas/show your problems with the cooperative table group. (seats 1 & 2 with seats 3 & 4)