Lesson 2.3-2.4 Assignment

Classify each description as an example of static equilibrium, dynamic equilibrium, or not equilibrium.

Groups:

(a) Static Equilibrium

,

(b) Dynamic Equilibrium

,

(c) Not Equilibrium

• A pencil sits at rest on the table

• A bowling ball rolls at a constant speed

• A shopper pushes their shopping cart at a constant speed

• A teacher pushes a table at a constant speed

• A skateboarder performs a trick on a ramp

• A ball slows down rolling to a stop

• A plane takes off from the runway

• A cyclist pedals at a constant speed

• A statue stands motionless

• A train moves along the tracks at a constant speed

• A person jumps off a diving board

• A laptop remains closed on a desk

• A swimmer maintains a steady pace in the pool

• A rocket launches into space

• A car speeds up through an intersection

• A student sits at rest in their chair

• A cup sits on a table

• A book lies on a shelf

What is the condition for an object to be in equilibrium?

• The forces on it add up to zero

• It is moving at a constant speed

• It is under the influence of only one force

• It is changing its state of motion

Tags

Understanding

Which of the following scenarios describes an object in equilibrium?

• A hockey puck sliding on ice at constant velocity

• A car accelerating on a highway

• A ball falling freely under gravity

• A person pushing a stationary wall

Tags

Applying

An object under the influence of only one force cannot be in ______.

Tags

Understanding

When the net force on an object is zero, the object is in ______.

Tags

Understanding

What happens to an object in equilibrium if it experiences a non-zero net force?

• It undergoes a change in motion

• It remains in equilibrium

• It stays at rest

• It moves in a straight-line path at constant speed

Tags

Applying

Equilibrium of forces means the net force acting on an object is 0 N.

• True

• False

Answer explanation

Two forces acting in opposite directions that cancel each other out.

What condition must be met if an object is to be in equilibrium?

• forces on it must be balanced

• forces on it must be unbalanced

• resultant force more than 10 N

• resultant turning effect more than 10