Understanding Balanced and Unbalanced Forces

What happens when forces acting on an object are balanced?

• The object will change its motion.

• The object will not change its motion.

• The object will accelerate.

• The object will decelerate.

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Which of the following is an example of an unbalanced force?

• Two people pushing a box with equal force from opposite sides.

• A book resting on a table.

• Gravity causing a ball to fall.

• A car moving at a constant speed.

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What role does friction play when sliding a book across a table?

• It acts as a balanced force, keeping the book moving.

• It acts as an unbalanced force, stopping the book.

• It acts as a force that speeds up the book.

• It acts as a force that lifts the book.

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How do engineers use the knowledge of balanced and unbalanced forces?

• To design faster vehicles.

• To predict weather patterns.

• To design safe structures and vehicles.

• To create new materials.

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What is the effect of gravity on a dropped ball?

• It pushes the ball upwards.

• It pulls the ball downwards.

• It keeps the ball in place.

• It makes the ball move sideways.

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