PQ Ch11

What is biomechanics?

• The study of the behaviour and function of inanimate objects when acted upon by forces.

• The branch of kinesiology that seeks to understand the behaviour and function of the living human body when it is acted upon by forces.

• The study of the behaviour of animals in their natural habitat.

• The study of the chemical processes within and relating to living organisms.

What is a proficient movement pattern?

• A movement pattern that maximises energy expenditure.

• A movement pattern that minimises energy expenditure while facilitating performance.

• A movement pattern that is only used by beginners.

• A movement pattern that is inefficient and slow.

Which of the following is an example of an external force?

• Muscle contraction

• Tendon tension

• Gravity

• Bone structure

What is the unit of measurement for force?

• Joules (J)

• Newtons (N)

• Metres (m)

• Kilograms (kg)

According to Newton's first law of motion, what is inertia?

• The tendency of an object to change its state of motion.

• The tendency of an object to remain in its current state of motion unless acted upon by an external force.

• The force required to accelerate an object.

• The reaction force experienced by an object.

What does Newton's second law of motion state?

• For every action, there is an equal and opposite reaction.

• An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an external force.

• A force applied to an object causes an acceleration of that object of a magnitude proportional to the force and in the direction of the force, but inversely proportional to the object's mass.

• The total energy of an isolated system remains constant.

If a force of 10 N is applied to a 0.15 kg baseball, what is the acceleration of the baseball?

• 66.67 m/s²

• 15 m/s²

• 75 m/s²

• 10 m/s²

What is the relationship between mass and inertia?

• Inertia is inversely proportional to mass.

• Inertia is directly proportional to mass.

• Inertia is unrelated to mass.

• Inertia is equal to mass.

Which of the following is an example of Newton's third law of motion?

• A curling rock sliding on ice.

• A gymnast holding a stationary pose.

• A basketball player jumping to make a slam dunk.

• A kettlebell resting on the floor.

What is the ground reaction force?

• The force exerted by the ground on an object in contact with it.

• The force exerted by an object on the ground.

• The force exerted by the air on a moving object.

• The force exerted by a muscle during contraction.