12 PE Chapter 5 Quiz

Which of the following is the best description of equilibrium?

• When all forces and torques acting on an object are unbalanced, and the object is in a state of rest or moving with a constant velocity

• When all forces and torques acting on an object are balanced, and the object is in a state of rest or moving with a constant velocity

• When all forces and torques acting on an object are unbalanced, and the object is in a state of rest or moving with an inconsistent velocity

• When all forces and torques acting on an object are unbalanced

Which of the following is NOT a factor that affects stability?

• Base of support

• Centre of gravity

• Gender

• Body mass

• Friction

Which of the following best describes stability?

• The resistance to the disruption of equilibrium

• Falling over easily

• The acceptance of the disruption of equilibrium

• Losing balance easily

Which of the following best describes balance?

• The ability to grow taller

• The inability to control equilibrium

• The ability to control equilibrium

• The inability to stand on one foot

Which of the following is NOT a component of a lever?

• Axis

• Resitance

• Force

• Base

The best description of the axis is

• Effort

• The weight to be moved

• The pivot point for rotation

• The pivot point where rotation does not occur

The best description of the 'resistance' is

• The weight or load to be moved

• The pivot point

• The weight not needing to be moved

• The effort

The best description of the 'force' is

• The resistance

• The pivot point for rotation

• The effort

• The base

When the resistance and force are on either side of the axis this is classified as:

• A first class lever

• A second class lever

• A third class lever

• A fourth class lever

When the force is between the resistance and the axis, the lever is classified as a:

• First class lever

• Second class lever

• Third class lever

• Fourth class lever