Exploring Force and Free-Body Diagrams in Biomechanics

What are the two main types of forces discussed in biomechanics?

• Internal and external forces

• Gravitational and magnetic forces

• Thermal and electrical forces

• Kinetic and potential forces

Which of the following is NOT an effect of force on a body?

• Changing direction

• Accelerating

• Changing color

• Creating motion

What is the term used for the sum of all forces acting on a body?

• Gravitational force

• Net force

• Frictional force

• Balanced force

If the net force on an object is zero, what can be said about the object's motion?

• It is changing direction

• It is accelerating

• It is decelerating

• It is stationary

Which force is represented by a vertical arrow pointing downwards from the center of mass in a Freebody diagram?

• Reaction

• Air resistance

• Weight

• Friction

In a Freebody diagram, where is the reaction force drawn from?

• The direction of travel

• The point of contact with the ground

• The top of the object

• The center of mass

Which factor does NOT affect air resistance?

• Temperature

• Shape

• Frontal cross-sectional area

• Velocity

What is the primary purpose of making a surface smoother in sports?

• To reduce air resistance

• To increase weight

• To increase friction

• To change direction

How does increasing the roughness of the ground surface affect friction?

• It changes the direction of friction

• It increases friction

• It has no effect on friction

• It decreases friction

What happens to friction when the temperature of an object increases?

• Friction increases

• Friction changes direction

• Friction remains the same

• Friction decreases