What does Newton’s Third Law state about forces between two objects?

• Forces act only on one object.

• For every action, there is an equal and opposite reaction.

• Forces always act in the same direction.

• Only moving objects experience forces.

(a)   is an example of Newton’s Third Law in action.

• A ball rolling down a hill.
• A swimmer pushing against the wall
• A car parked on a flat road.
• A leaf falling from a tree.

A constraint in a design problem is a (a)   .

• A possible solution.
• A limitation or restriction.
• A scientific principle.
• A group of cells.

Which term describes the requirements that a design must meet to be successful?

• Constraints

• Criteria

• Subsystems

• Collisions

When two objects collide, what is transferred between them?

• Light

• Force

• Sound

• Heat

What is the main purpose of evaluating competing design solutions?

• To choose the most expensive option.

• To determine which solution best meets the criteria and constraints.

• To avoid using scientific principles.

• To ignore environmental impacts.

What is the first step in designing a solution to a collision problem?

• Build a prototype.

• Define the criteria and constraints.

• Test the solution.

• Ignore scientific principles.

Which scientific principle is most important when designing solutions for colliding objects?

• Newton’s Third Law

• Photosynthesis

• Gravity

• Magnetism

(a)   is a force that can act during a collision.

• Friction
• Photosynthesis
• Evaporation
• Digestion