Biomechanics Learning Outcome B Review

What does Newton's First Law of Motion state?

• A body will remain at rest or at a constant velocity unless compelled to change by an external force acting on it.

• The acceleration of a body is proportional to the force causing the acceleration.

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

• Force is the push or pull effect that causes a body to change its state of motion.

According to Newton's Second Law of Motion, what determines the acceleration of a body?

• The equal and opposite reaction of forces.

• The external force acting in the opposite direction.

• The proportionality of the force causing the acceleration and the acceleration itself.

• The constant speed of the body in a straight line.

Newton's Third Law of Motion implies that when an object exerts a force on another, the second object will:

• Remain at rest unless acted upon by an external force.

• Experience an equal force in the opposite direction.

• Accelerate proportional to the force applied.

• Not change its state of motion unless the force is unbalanced.

Which scenario is an example of Newton's Third Law of Motion?

• A cyclist maintaining a constant speed on a flat road.

• A footballer changing direction suddenly.

• A golfer strikes a ball from a tee.

• An athlete pushing downwards on the ground.

What is the measure of force as described in the context of reaction forces?

• Meters per second squared (m/s²).

• Kilograms (kg).

• Newtons (N).

• Joules (J).

What is the weight of an athlete whose mass is 75 kg when standing upright without moving?

• 75 N

• 736 N

• 75 kg

• 9.81 N

According to Newton's Third Law, if an athlete pushes down on the ground with a force of 736 N, what is the force exerted by the ground?

• 736 N upwards

• 75 N upwards

• 9.81 N upwards

• 0 N

What type of friction occurs when a body moves along a surface and an external force is enough to move it?

• Static friction

• Kinetic friction

• Rolling friction

• Fluid friction

Which type of friction is described as the resistance to motion of an object in a fluid due to friction exerted between the body or object and the fluid?

• Static friction

• Kinetic friction

• Rolling friction

• Fluid friction

What is the coefficient of friction used to represent?