![]() When a person pushes off from the ground while walking, s/he exerts a force upwards on the shoe that is greater than the downward force of gravity so the shoe (and foot) accelerate upwards to start the step. The force s/he exerts on the ground can be calculated using Newton's second law.Ī = acceleration (meters/second 2) When a person is standing, these forces are equal and opposite, causing the person not to move.Ī scale measures a person's weight. As applies to this lesson, gravity exerts a downwards force on a shoe and the ground exerts an upwards force on a shoe. Lesson Background and Concepts for TeachersĪ force is anything that causes an object to undergo acceleration. Then proceed to conduct the two associated activities for this lesson Convertible Shoes: Function, Fashion and Design and High Arches, Low Arches.) Supplies needed: a scale to measure students' weight, worksheets, pencils, calculators. (Divide the class into teams of two to four students and have each team complete the Static Forces Worksheet and Kinetic Movement Worksheet. (Deliver content material as provided in the Background Concepts for Teachers section.) Running shoes must provide enough support to pad the foot and prevent injuries to the runner while being flexible enough to allow the foot to flex through the stride. A high heeled shoe must be designed to withstand these forces while also providing foot support.Ī running shoe, on the other hand, must be able to withstand the impact of hitting the ground every time the runner takes a stride, decrease the impulse felt by the foot, and do so without slipping, enabling a runner to propel himself forward. For example, the pressure that a stiletto heel exerts on the ground midstride is substantially greater than that of an elephant walking. Some of these forces and pressures are enormous. The entire shoe must be able to withstand these forces for their lifetime, without failure. Shoes are subjected to a range of forces during walking and running. Engineers design shoes and spend countless hours testing them so that they perform a variety of required functions while conforming to current styles and trends. Supplies needed: a scale to measure students' weight when walking or jogging, worksheets, pencils, calculators.)ĭesigning a shoe is a complex process in which several factors must be considered. Also make copies of the Static Forces Worksheet and Kinetic Movement Worksheet, enough for one per group of three to four students. (Hand out the attached Force and Pressure Quiz for students to individually complete before beginning the lesson. ![]() A familiarity with pressure, impact and impulse is also useful, but not required. #Impulsive force model worksheet 1 answer how toExplain the difference between overpronation and underpronation, and how to fix the misalignments with orthotics.Ī basic knowledge of forces is required.Explain how pressures on different parts of the foot increase and decrease while walking or running.Identify the different parts of the walking gait.Calculate force, pressure, impact force and impulse.Describe how force and pressure are related.Several high-heeled designs feature a storable heel to help alleviate the problems associated with high heels, including driving and long-term discomfort leading to injury.Īfter this lesson, students should be able to: Designing a heeled shoe produces a different set of challenges from an athletic shoe, both for the designer and the wearer. Shoes must withstand a multitude of forces, pressures and impacts on a daily basis and for the life of the shoe. ![]() #Impulsive force model worksheet 1 answer seriesOf the many different types of engineers, some design shoes! Since walking and running are both complex series of movements, shoes are designed to provide support to specific foot areas to prevent injury. This engineering curriculum aligns to Next Generation Science Standards ( NGSS). Students learn about the mechanics of walking, shoe design and common gait misalignments that often lead to injury. They are introduced to pressure, force and impulse as they relate to shoes, walking and running. Students explore the basic physics behind walking, and the design and engineering of shoes to accommodate different gaits. ![]()
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