Biomechanics Exam 2 Questions and Correct Graded A+ Answers
Linear Kinematics - Answer-describing linear motion in specific terms
ex: displacement, velocity, acceleration
Linear Displacement - Answer-a change in location
-the distance from initial to final location
-related to linear distance: entire change in position
-units: m, ft, yards, miles
Linear Velocity - Answer-the rate of change in position
-related to linear speed
-units mearsured in m/sec, ft/sec
*velocity= displacement/time
-linear velocity in running is affected by stride length and stride rate; increasing either
increases linear velocity
Acceleration - Answer-rate of change in linear velocity
*acceleration=change in velocity (v2-v1)/time
-measured in units of m/sec or m/sec/sec
Positive Acceleration - Answer-increase in velocity
-start of sprint
Negative Acceleration - Answer-decrease in velocity
-towards end of sprint-fatigue
Zero Acceleration - Answer-no change in velocity
-middle of sprint
Projectile (motion) - Answer-a body in free fall, body that is airbourn
Forces acting on projectile - Answer-gravity and air resistance
Trajectory - Answer-flight path of projectile
Law of Inertia - Answer-horizontal velocity of a projectile is constant and will follow a
straight line, unless external forces affect projectile
-external forces on horizontal force is air resistance
-gravity doesn't affect horizontal velocity
Law of Acceleration - Answer-affects vertical velocity of projectile
-affected by force of gravity
-ascending phase: vertical velocity will decrease
-at peak: vertical velocity is 0
-descending phase: vertical velocity will increase due to gravity
effect of gravity (on a projectile) - Answer-the force of gravity produces a constant
acceleration of 9.81 m/s
Linear Kinematics - Answer-describing linear motion in specific terms
ex: displacement, velocity, acceleration
Linear Displacement - Answer-a change in location
-the distance from initial to final location
-related to linear distance: entire change in position
-units: m, ft, yards, miles
Linear Velocity - Answer-the rate of change in position
-related to linear speed
-units mearsured in m/sec, ft/sec
*velocity= displacement/time
-linear velocity in running is affected by stride length and stride rate; increasing either
increases linear velocity
Acceleration - Answer-rate of change in linear velocity
*acceleration=change in velocity (v2-v1)/time
-measured in units of m/sec or m/sec/sec
Positive Acceleration - Answer-increase in velocity
-start of sprint
Negative Acceleration - Answer-decrease in velocity
-towards end of sprint-fatigue
Zero Acceleration - Answer-no change in velocity
-middle of sprint
Projectile (motion) - Answer-a body in free fall, body that is airbourn
Forces acting on projectile - Answer-gravity and air resistance
Trajectory - Answer-flight path of projectile
Law of Inertia - Answer-horizontal velocity of a projectile is constant and will follow a
straight line, unless external forces affect projectile
-external forces on horizontal force is air resistance
-gravity doesn't affect horizontal velocity
Law of Acceleration - Answer-affects vertical velocity of projectile
-affected by force of gravity
-ascending phase: vertical velocity will decrease
-at peak: vertical velocity is 0
-descending phase: vertical velocity will increase due to gravity
effect of gravity (on a projectile) - Answer-the force of gravity produces a constant
acceleration of 9.81 m/s
