Biomechanics Exam 2 Exam Study Questions
Answered Correctly
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
factors that affect flight path of projectory - Answer -projection angle
-projection velocity/speed
-relative projection height
Projection angle - Answer direction of projection with respect to the horizontal
-to maximize horizontal distance, angle should be 45*
-to maximize vertical distance the angle of projection should be closest to 90* as possible
Answered Correctly
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
factors that affect flight path of projectory - Answer -projection angle
-projection velocity/speed
-relative projection height
Projection angle - Answer direction of projection with respect to the horizontal
-to maximize horizontal distance, angle should be 45*
-to maximize vertical distance the angle of projection should be closest to 90* as possible
