Biomechanics Basics

What is linear motion?

• when a body and all parts connected to it travel different distances in different directions and at different speeds

• when a body and all parts connected to it travel the same distance in different directions at the same speed

• when a body and all parts connected to it travel the same distance in the same direction and at the same speed

• when an athlete travels at the same speed in one line as other athletes on the same team

What is velocity?

• refers to the change in distance of an object and is calculated using distance divided by the time taken

• refers to the rate of positional change of an object and is calculated using displacement divided by the time taken

• refers to the rate of positional change of an athlete and is calculated using time taken divided by the speed

• refers to the calculation of displacement divided by the acceleration

Speed is

• distance/time

• power/time

• displacement/time

• time/acceleration

General motion is

• A combination of linear motion and acceleration

• A combination of linear motion and angular momentum

• A combination of angular motion and speed

• A combination of linear motion and angular motion

What is angular motion?

• the movement of a body/object along a curved path with a fixed axis

• the movement of a body/object along a straight path with a fixed axis

• the speed of a body/object along a curved path with a fixed axis

• the displacement of a body/object along a curved path where momentum is fixed

The calculation for momentum is

• mass x acceleration

• mass x distance

• mass x speed

• mass x velocity

Angular momentum is

• When fixed bodies travel in a straight line along a curved path

• When moving bodies do not travel in a straight line

• When stationary bodies do not travel in a straight line

• When moving bodies travel in a straight line

In a baseball hit, the momentum transferred to the ball depends on

• the mass of the ball and its speed after impact

• the direction of the bat swing and its linear speed at the time of impact

• the mass of the bat and its linear speed at the time of impact

• the mass of the bat and its angular velocity immediately prior to impact

Acceleration is

• the rate of change of velocity with respect to time

• the rate of change of velocity with respect to distance

• the rate of change of velocity with respect to mass

• the rate of change of speed with respect to time

An example of angular motion is

• Cycling

• Swimming

• High Jump

• Skiing