Balanced and Unbalanced Forces Quiz

Select the option that best completes the following sentence. When unbalanced forces act on an object they:

• change the mass of an object

• always make an object fall to the ground

• change the motion of an object

• hold an object in place

Tags

NGSS.MS-PS2-2

Learning goal 1: Determine which description applies to arrows that represent balanced forces.

• Different lengths and pointing in the same direction

• The same length and pointing in the same direction

• Different lengths and pointing in opposite directions

• The same length and pointing in opposite directions

This force diagram shows two forces acting on an acrobat. Determine whether the following statement is true or false. The forces acting on the acrobat are balanced.

• True

• False

Tags

NGSS.HS-PS2-1

Identify which two of the following objects have unbalanced forces acting on them.

• A tennis ball being served

• A shirt hanging on a clothesline

• A train slowing down to stop at a station

• A kettle resting on a bench

Tags

NGSS.MS-PS2-2

Determine which two descriptions apply to an unbalanced force.

• A force that has no effect on an object's motion

• A force that is equal in size and opposite in direction to another force

• A force that affects an object's motion

• A force without an equal and opposite force acting on the same object

Tags

NGSS.HS-PS2-1

Determine whether the following statement is true or false. A car travelling at a constant speed in a straight line has unbalanced forces acting on it.

• True - it's moving, so the forces must be unbalanced

• False - it's travelling at a constant speed in a straight line, so the forces must be balanced

Tags

NGSS.MS-PS2-2

Which of the following scenarios best illustrates unbalanced forces?

• A car parked on a driveway

• A person standing still on the ground

• A rocket launching into space

• A book lying on a shelf

Tags

NGSS.3-PS2-1

Which of the following scenarios best illustrates balanced forces?

• A book resting on a table

• A car accelerating on a highway

• A ball rolling down a hill

• A person jumping off a diving board

Determine whether the following statement is true or false. An object at rest has unbalanced forces acting on it.

• True - it must have unbalanced forces to remain at rest

• False - it must have balanced forces to remain at rest

Determine whether the following statement is true or false. A stationary object with no net force acting on it will start moving.

• True - it will start moving

• False - it will remain stationary