Biomechanics: Forces and centre of mass

Which of Newton's Laws of Motion states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force?

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• Newton's Law of Universal Gravitation

In biomechanics, what is the centre of mass?

• The point where the mass of an object is concentrated

• The point where the gravitational force is zero

• The point where the object is in equilibrium

• The point where the object has maximum velocity

Which of the following is an example of equilibrium in biomechanics?

• A sprinter starting a race

• A gymnast holding a handstand

• A cyclist accelerating

• A swimmer diving into a pool

According to Newton's Second Law, what is the relationship between force, mass, and acceleration?

What is the unit of torque in the International System of Units (SI)?

• Newton

• Joule

• Newton-metre

• Watt

Which of the following best describes rotational motion?

• Motion along a straight line

• Motion around a fixed axis

• Motion in a circular path

• Motion with constant velocity

What is the primary application of biomechanics in sports?

• To increase the weight of athletes

• To improve performance and reduce injury

• To decrease the speed of athletes

• To increase the number of sports events

Which of Newton's Laws explains the action-reaction principle?

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• Newton's Law of Universal Gravitation

What is the effect of increasing the distance from the pivot point on the torque produced by a force?

• Torque decreases

• Torque remains the same

• Torque increases

• Torque becomes zero