Balanced & Unbalanced Forces Quiz

Which statement best describes balanced forces?

• Balanced forces do not cause a change in motion of an object.

• Balanced forces always make objects move faster.

• Balanced forces cause objects to change direction quickly.

• Balanced forces only act on objects that are not moving.

How do unbalanced forces affect an object?

• Unbalanced forces cause a change in position, direction, or speed of an object.

• Unbalanced forces keep an object at rest.

• Unbalanced forces only act on objects in space.

• Unbalanced forces have no effect on the motion of an object.

Tags

NGSS.MS-PS2-2

Which of the following best describes a force?

• A push or a pull from one object on another, which may or may not cause movement.

• A movement that always results in an object changing direction.

• A pull that only acts downward toward Earth’s center.

• A push that only acts upward away from Earth’s surface.

Tags

NGSS.MS-PS2-1

Gravity pulls a book downward on a table, while the table pushes up on the book. What is the normal force in this situation?

• The upward force exerted by the table on the book.

• The downward force exerted by gravity on the book and table together.

• The sideways force exerted by the book on the table.

• The downward force exerted by the book on the table.

Which statement about balanced forces is correct?

• Balanced forces are equal in size and act in opposite directions on an object.

• Balanced forces always cause an object to speed up.

• Balanced forces are unequal and act in the same direction.

• Balanced forces only occur when an object is moving.

A soccer ball sits on the ground, not moving, because gravity and the normal force are equal and opposite. Which of the following is another example of balanced forces?

• A book resting on a shelf, with gravity pulling down and the shelf pushing up.

• A car accelerating down a hill.

• A person jumping off a chair.

• A ball rolling faster and faster across the floor.

Which of the following is an example of balanced forces?

• A cup sitting on a table at rest

• A car accelerating down a hill with increasing speed and changing direction

• A ball being thrown upward and slowing down

• A person jumping off a moving bus

What always happens when unbalanced forces act on an object?

• There is a change in motion in position, direction, or speed

• The object remains at rest

• The forces cancel each other out and nothing happens

• The object moves at a constant speed in the same direction

Tags

NGSS.MS-PS2-2

Which statement best describes unbalanced forces?

• Two forces that are unequal in size and opposite in direction

• Two forces that are equal in size and opposite in direction

• Two forces that are equal in size and same in direction

• Two forces that are unequal in size and same in direction

Tags

NGSS.MS-PS2-2

The moon orbiting the earth is an example of unbalanced forces because it changes direction and position. Which of the following is another example of unbalanced forces?

• A soccer ball being kicked and changing speed

• A book resting on a shelf

• A car parked in a garage

• A train moving at a constant speed in a straight line

Tags

NGSS.MS-PS2-2

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