A physical therapist examines the range of motion of the knee joint for a patien

Question

A physical therapist examines the range of motion of the knee joint for a patient who is recovering

from a knee replacement. The maximum extension angle that the patient can reach is an angle of

164° between the lower leg and thigh. The maximum flexion angle the patient can reach is an angle

of 93° between the lower leg and thigh. If the patient goes from full extension to full flexion in 1.8

seconds what is their (a) angular displacement in degrees and (b) average angular velocity in degrees

per second? (2 pts)

****show all work with magnitude and direction and correct signficant digits

Explanation / Answer

a. Angular displacement in degrees = (164 - 93) = 71 degrees to the left side and perpendicular to the plane joining lower leg and thigh

b. angular velocity = (164 - 93) / 1.8 = 39.44 degrees / second to the left side and perpendicular to the plane joining lower leg and thigh

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