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For each of the following four knee positions (A, B, C, and D), there are two weight vectors (vector 1, indicating the weight of the leg, and vector 2, indicating the weight of an external weight attached to the ankle). State the angle of the each vector’s moment arm relative to the thigh segment (i.e., the upper portion of the leg that is proximal to the knee joint), such that perpendicular to the thigh would be 90

At complete extension, the elbow joint angle is about 3.14 radians.

The New Deal offered a legacy in all of the following ways EXCEPT in …

List all the necessary components of the Hill muscle model discussed in class, and briefly describe the implications of omitting one or more of these components in the context of modeling muscle behavior.

In the Second New Deal, Roosevelt did all of the following EXCEPT …

Position is the derivative of velocity.

The vertical velocity of a projectile at release determines how high the projectile goes.

The same image below shows the hip joint angle over the course of the gait cycle. A) During which percentages of the gait cycle is hip angular acceleration positive? B) During which percentages of the gait cycle is hip angular acceleration negative? Your answers for A and B should be reported in intervals (e.g., 0-10%).

A golfball was driven straight horizontally from a point 3 meters above a level fairway. If the ball landed (and stopped immediately) on the fairway at a point 150 m horizontally from the starting point, what was the velocity of the ball immediately after it was hit? 

The direction of the linear velocity vector is perpendicular to the path of a rotating rigid body.