# Kimberly Wong - Physics_ Mousetrap Cars Lab Report.docx -...

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Kimberly Wong 1/8/18 Per: 7 Efficient Mousetrap Car Test Introduction: We wanted to create the best design for a mousetrap car with limited materials that would travel the longest distance. In preparation of further exploration we asked ourselves; Would our material choice of the car frame affect the distance traveled? What type of material would work best for the wheels that would cause the mousetrap car to perform most effectively? Is a lighter car or heavier car more capable to travel uphill? Does the positioning of the mousetrap on the body of the car affect how much power is used and direction of energy? Prior research we have done to fulfill this experiment is that we learned that the best material to use for the wheels are CDS because they minimize roll resistance on the ground. While the use of tape on the edges of the CD creates more traction or friction to the ground so that it stays put and keeps balance. Crucial equations that we will be needing to complete our data is the force of friction equation F=kfmg and momentum equation: P=Mv. We hypothesized that the usage of CDs as the back wheels and smaller petri dishes as the front wheels will create the most balance and speed for the car causing it to be most efficient. The manipulated variable are the materials we decided to build the car out of and responding variable is the distance that the car travels. Materials: Cardboard, popsicle sticks, 2 CDS, 2 petri dishes, masking tape, hot glue fun, mousetrap, thick straws, long wooden dowel, drill, and sandpaper. Procedure: Build the frame of the rocket by gluing 2 8’’ by 1’’ cardboard with 2 5’’ 1’’ cardboard to create a rectangle shape. Use 8 inch wooden dowels as the axles, take 2 small square cardboard piece and screw a hole in it half way so that the dowel could fit. Glue the first side of the azel into the small piece of cardboard and sand down the axel until smooth. Place 2 pieces of cut straw onto the dowel before we close it off with another piece of cardboard on the other end with hot glue. Wrap the ends of each CD with masking tape to create more traction on the ground. Glue the cardboard axles onto the center of the cd on each side, then sandwich it with another piece of cardboard on the other side for extra security. Connect the the straw part of the wheel onto the body of the frame with glue. For the second set of wheels, use 2 petri dishes and apply the same method, drilling a hole halfway into each small piece of cardboard and then placing the straw on the dowel before closing the ends of the dowel with the cardboard pieces. Cover the petri dishes with masking tape. Glue the cardboard end of the axle onto the petri dishes. Glue the straw part of the axle onto the body of the frame. Glue 2 popsicle sticks onto the frame to support the mousetrap, glue the mousetrap on the top of the popsicle sticks. Take 6 popsicle sticks and glue in X shape under the frame. Attach a long wooden dowel between two cardboard pieces to sandwich against the snapper of the mousetrap. Tie a thin string the length of from the back
wheel axis to the tip of the wooden dowel.