Recaping Biomechanics Concepts

What is force summation?

• The combination of all forces acting on an object to produce movement

• The balance of forces to maintain stability

• The measurement of internal forces within the body

• The calculation of gravitational forces

Which of the following best describes internal forces?

• Forces that act on an object from the outside

• Forces generated within the body, such as muscle contractions

• Forces that are always constant

• Forces that only act in a vacuum

What is simultaneous force summation?

• The sequential application of forces

• The application of all relevant forces at the same time

• The balance of forces to maintain equilibrium

• The measurement of external forces

Which of the following is an example of sequential force summation?

• Jumping straight up

• Throwing a ball

• Standing still

• Balancing on one foot

What is the primary factor that affects balance and stability?

• Speed

• Base of support

• Colour of the object

• Temperature

How does a wider base of support affect stability?

• It decreases stability

• It has no effect on stability

• It increases stability

• It makes movement faster

Where is the centre of gravity typically located in the human body?

• At the head

• At the feet

• Around the belly button

• At the hands

What is a third class lever?

• A lever where the fulcrum is between the effort and the load

• A lever where the load is between the fulcrum and the effort

• A lever where the effort is between the fulcrum and the load

• A lever with no fulcrum

Which of the following is an example of a third class lever in the human body?

• The elbow joint during a bicep curl

• The ankle joint during a calf raise

• The knee joint during a squat

• The neck joint during head rotation

What does the principle of leverage state?

• The longer the lever, the less force needed to move an object

• The shorter the lever, the more force needed to move an object

• The length of the lever has no effect on the force needed

• The lever must always be horizontal