PLTW POE Unit 1 Review Questions

What is the definition of isometric?

• A method of projection in which a 3D object is presented by a drawing having all three axes equally inclined and all lines drawn to scale.

• A rigid bar used to exert a pressure or sustain a weight at one point of its length by the application of a force at a second and turning at a third on a fulcrum.

• The structure of or the relationship of the parts in a machine, or in a construction or process comparable to a machine.

• The turning effect of a force about a point equal to the magnitude of the force times the perpendicular distance from the point to the line of action from the force.

What is the definition of lever?

• A method of projection in which a 3D object is presented by a drawing having all three axes equally inclined and all lines drawn to scale.

• A rigid bar used to exert a pressure or sustain a weight at one point of its length by the application of a force at a second and turning at a third on a fulcrum.

• The structure of or the relationship of the parts in a machine, or in a construction or process comparable to a machine.

• The turning effect of a force about a point equal to the magnitude of the force times the perpendicular distance from the point to the line of action from the force.

What is the definition of mechanism?

• A method of projection in which a 3D object is presented by a drawing having all three axes equally inclined and all lines drawn to scale.

• A rigid bar used to exert a pressure or sustain a weight at one point of its length by the application of a force at a second and turning at a third on a fulcrum.

• The structure of or the relationship of the parts in a machine, or in a construction or process comparable to a machine.

• The turning effect of a force about a point equal to the magnitude of the force times the perpendicular distance from the point to the line of action from the force.

What is the definition of moment?

• A method of projection in which a 3D object is presented by a drawing having all three axes equally inclined and all lines drawn to scale.

• A rigid bar used to exert a pressure or sustain a weight at one point of its length by the application of a force at a second and turning at a third on a fulcrum.

• The structure of or the relationship of the parts in a machine, or in a construction or process comparable to a machine.

• The turning effect of a force about a point equal to the magnitude of the force times the perpendicular distance from the point to the line of action from the force.

What is the definition of pitch?

• Distance between adjacent threads in a screw.

• A type of lever that is a wheel with a groove in its rim, which is used to change the direction or multiply a force exerted by a rope or cable.

• Impeding effect exerted by one material object on another.

• An inclined plane wrapped around a cylinder, forming the path and pitch.

What is the definition of pulley?

• Distance between adjacent threads in a screw.

• A type of lever that is a wheel with a groove in its rim, which is used to change the direction or multiply a force exerted by a rope or cable.

• Impeding effect exerted by one material object on another.

• An inclined plane wrapped around a cylinder, forming the path and pitch.

What is the definition of resistance force?

• Distance between adjacent threads in a screw.

• A type of lever that is a wheel with a groove in its rim, which is used to change the direction or multiply a force exerted by a rope or cable.

• Impeding effect exerted by one material object on another.

• An inclined plane wrapped around a cylinder, forming the path and pitch.

What is the definition of screw?

• Distance between adjacent threads in a screw.

• A type of lever that is a wheel with a groove in its rim, which is used to change the direction or multiply a force exerted by a rope or cable.

• Impeding effect exerted by one material object on another.

• An inclined plane wrapped around a cylinder, forming the path and pitch.

What is the definition of simple machine?

• Any of various elementary mechanisms including the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw.

• A type of lever that is a wheel with a groove in its rim, which is used to change the direction or multiply a force exerted by a rope or cable.

• Impeding effect exerted by one material object on another.

• An inclined plane wrapped around a cylinder, forming the path and pitch.

What is the definition of sprocket?

• A toothed wheel whose teeth engage the links of a chain.

• A type of lever that is a wheel with a groove in its rim, which is used to change the direction or multiply a force exerted by a rope or cable.

• Impeding effect exerted by one material object on another.

• An inclined plane wrapped around a cylinder, forming the path and pitch.