Rotational Equilibrium & Torque

Which of the following best describes the difference between translational and rotational motion?

• Translational motion involves movement along a straight path, while rotational motion involves movement around an axis.

• Translational motion involves movement around an axis, while rotational motion involves movement along a straight path.

• Both translational and rotational motion involve movement along a straight path.

• Both translational and rotational motion involve movement around an axis.

Distinguish between stable and unstable rotational equilibrium.

• Stable equilibrium occurs when an object returns to its original position after being slightly disturbed, while unstable equilibrium occurs when an object moves further away from its original position after being disturbed.

• Stable equilibrium occurs when an object moves further away from its original position after being slightly disturbed, while unstable equilibrium occurs when an object returns to its original position after being disturbed.

• Stable equilibrium and unstable equilibrium both occur when an object remains in its original position after being disturbed.

• Stable equilibrium occurs when an object remains in its original position after being disturbed, while unstable equilibrium occurs when an object moves back to its original position after being disturbed.

What is rotational inertia and what are the factors affecting it?

• Rotational inertia is the resistance of an object to changes in its rotational motion; factors affecting it include mass distribution and axis of rotation.

• Rotational inertia is the force required to rotate an object; factors affecting it include speed and direction of rotation.

• Rotational inertia is the energy stored in a rotating object; factors affecting it include temperature and pressure.

• Rotational inertia is the velocity of a rotating object; factors affecting it include time and distance.

What is the definition of torque and lever arm?

• Torque is the force that causes an object to rotate, and the lever arm is the distance from the pivot point to the point where the force is applied.

• Torque is the speed at which an object rotates, and the lever arm is the length of the object.

• Torque is the mass of an object, and the lever arm is the width of the object.

• Torque is the energy required to move an object, and the lever arm is the height of the object.

Which of the following is true about translational motion?

• Only some parts of the object move together.

• All parts of the object move together.

• The object does not move.

• The object moves in a circular path.

Tags

NGSS.MS-PS2-2

In translational motion, how can the object be treated?

• As a collection of points.

• As a single point.

• As a rotating body.

• As a stationary object.

What does an object do around an axis?

• Rotate

• Translate

• Vibrate

• Expand

How do parts of an object move in rotational motion?

• They move in a straight line.

• They move in a circular path around an axis.

• They remain stationary.

• They move randomly.

What happens to the speed of a part of an object as its distance from the axis increases?

• The speed decreases.

• The speed remains constant.

• The speed increases.

• The speed becomes zero.

What is the definition of the center of gravity?

• The point at which all the weight of an object can be considered to be concentrated.

• The point at which an object is in motion.

• The point at which an object is at rest.

• The point at which an object is balanced.