Tug-of-War Force Stations Glider Engineering (Newton’s 3rd) (FBDs) (Culminating Activity) Students create a glider to be launched by a rubber band or gravity-driven launcher. The glider must Students visit stations around achieve a minimum launch Students use their force meters the room and “draw the velocity, but avoid too great to investigate systems where Student forces.” Then, FBDs are forces oppose each other. They an acceleration (so the Experience introduced, and students predict force meter readings “pilot” doesn’t black-out). If create correct FBDs for each before testing. using rubber band, teacher system. provides students with average force exerted by the launcher. T4T cart materials, simple Material Student-made force meters. T4T cart materials machines. Newton’s 3rd Law. Free-body diagrams help depict Fnet = ma Big Idea = 2a∆x v2 v02 + FA,B = –FB,A the forces acting on a system. Connection to Students will create a FBD of Culminating -- -- the glider-catapult system. Activity CA Standards PH1. d. -- -- Next Gen. Sci. -- -- HS-PS2-1 Standards Time One 55-min period One 55-min period Five to eight 55-min periods Activity Guide for Forces Unit Prior Knowledge: Students know how to solve problems that involve constant speed and average speed. (v = ∆x/∆t) Students know how to solve problems that involve constant acceleration and average acceleration (a = ∆v/∆t) Students know how to solve for the acceleration of an object starting at rest (v0 0) and traveling a = a given distance for an amount of time (Use = ½ t. v0t + at2.) ∆x ∆x Students know how to solve for the final velocity of an object starting at rest (v0 0) and v = undergoing a constant acceleration for a distance (Use = 2a∆x.) a ∆x. v2 v02 + Students know that a gravity will accelerate a falling object at 9.8 m/s2 .
Tug-of-War (Newton’s 3rd) Force Stations (FBDs) Glider Engineering (Culminating Activity) Student Experience Students use their force meters to investigate systems where forces oppose each other. They predict force meter readings before testing. Students visit stations around the room and “draw the forces.” Then, FBDs are introduced, and students create correct FBDs for each system. Students create a glider to be launched by a rubber band or gravity-driven launcher. The glider must achieve a minimum launch velocity, but avoid too great an acceleration (so the “pilot” doesn’t black-out). If using rubber band, teacher provides students with average force exerted by the launcher. Material Student-made force meters. T4T cart materials, simple machines. T4T cart materials Big Idea Newton’s 3rd Law. FA,B = –FB,A Free-body diagrams help depict the forces acting on a system. Fnet = ma v2 = v02 + 2a∆x Connection to Culminating Activity -- Students will create a FBD of the glider-catapult system. -- CA Standards PH1. d. -- -- Next Gen. Sci. Standards -- -- HS-PS2-1 Time One 55-min period One 55-min period Five to eight 55-min periods Activity Guide for Forces Unit Prior Knowledge: Students know how to solve problems that involve constant speed and average speed. (v = ∆x/∆t) Students know how to solve problems that involve constant acceleration and average acceleration (a = ∆v/∆t) Students know how to solve for the acceleration a of an object starting at rest (v0 = 0) and traveling a given distance ∆x for an amount of time t. (Use ∆x = v0t + ½ at2.) Students know how to solve for the final velocity v of an object starting at rest (v0 = 0) and undergoing a constant acceleration a for a distance ∆x. (Use v2 = v02 + 2a∆x.) Students know that a gravity will accelerate a falling object at 9.8 m/s2 .
FORCES-The_Glider.docx