Quiz 3 - Linear Kinematics of Human Motion

Which of the following terms describes the location of the center of rotation at a joint at a given instant time?

instant center

_______________ = Angular Displacement / Change in Time

angular velocity

If velocity is constant, then acceleration is what?

zero

The Greek letter Δ (delta) is used to represent what?

change in

A runner moving at a velocity of 6m/s increases the velocity in a 2 s time interval to a rate of 10 m/s. What is the acceleration?

2 m/s²

Which of the following components of projectile motion is affected by gravity?

vertical component

A runner completes 1 full lap around a 400 meter track. What is her displacement?

zero

If the velocity of a sailboat changes from 4 m/s to 2 m/s over a period of time, what is true of the sailboat's acceleration?

it is negative

If the knee joint goes through 100° of flexion during the down phase of a squat, what is the total angular distance during 10 complete squats?

2000°

Which angular direction is conventionally regarded as positive?

counterclockwise