Week 3 Assessment: Forces, Friction & Safe Design

What is friction?

• A form of energy

• A force that resists motion

• A type of chemical reaction

• A way to increase speed

Which type of friction keeps an object at rest?

• Static friction

• Rolling friction

• Kinetic friction

• Fluid friction

Which surface would likely have the most friction?

• Ice

• Wet tile

• Sandpaper

• Glass

Why is friction important in shoe design?

• It looks better

• It prevents slipping

• It adds weight

• It reduces cost

What does a force diagram show?

• The parts of a shoe

• Different types of materials

• The forces acting on an object

• A team of engineers

Which force pulls objects toward Earth?

• Friction

• Magnetism

• Gravity

• Tension

What is the normal force?

• A. A pushing force from wind

• B. A pulling force from rope

• C. The upward force from a surface

• D. A magical force from space

Engineers often need to balance:

• Color and shape

• Cost and performance

• Music and art

• Speed and creativity

A high coefficient of friction means:

• Less grip

• More sliding

• Greater resistance to movement

• Lighter materials

Which of the following would be best for a slippery gym floor?

• Rubber soles

• Smooth leather

• Metal spikes

• Plastic shoes