Chapter 3 Revision Quiz

Which of the following best describes 'impulse' in biomechanics?

• The product of mass and acceleration

• The change in momentum resulting from a force applied over time.

• The resistance of an object to change its state of motion

• The distance covered per unit time.

In a 400-meter race around a standard track, what is the displacement of a runner who finishes at the starting point?

• 0m

• 100m

• 400m

• 800m

According to the principle of conservation of momentum, when two ice skaters collide and push off each other, the total momentum:

• Increases

• Decreases

• Remains the same

• Depends on the mass

A baseball player swings a bat, starting with the legs, then hips, torso, and finally the arms and bat. This sequence exemplifies:

• Linear Motion

• Summation of Momentum

• Moment of Intertia

• Linear Velocity

If a cyclist increases their pedaling rate, resulting in higher wheel rotations per minute, which of the following is directly increased?

• Mass

• Moment of Intertia

• Linear Displacement

• Linear Velocity

When a figure skater pulls their arms in during a spin, what happens to their moment of inertia and angular velocity?

• Both Increase

• Both Decrease

• Moment of inertia decreases; angular velocity increases

• Moment of inertia increases; angular velocity decreases