M2.2 Cat A Friction

What does the symbol μ represent in the friction formula?

• Mass

• Velocity

• Coefficient of friction

• Acceleration

What is the normal force (N) usually equal to on horizontal surfaces?

• The body's speed

• The body's weight

• The body's height

• The body's volume

What is the unit of friction (F) in the formula?

• Meters

• Kilograms

• Newtons

• Joules

What does the normal force (N) act perpendicular to?

• The surface

• The air

• The light

• The sound

What is the effect of different materials on friction?

• They have the same friction

• They have different coefficients of friction

• They have no friction

• They increase speed

What is the symbol for the coefficient of friction?

• α

• β

• μ

• δ

What is the effect of friction on surfaces?

• It makes them smoother

• It causes wear and tear

• It makes them shiny

• It makes them sticky

What is the effect of mounting an object on rollers?

• Increases friction

• Reduces friction

• Has no effect

• Stops motion

Which type of friction acts on a stationary object?

• Rolling friction

• Fluid friction

• Kinetic friction

• Static friction

What is the relationship between friction and the roughness of a surface?

• Friction decreases with roughness

• Friction is independent of roughness

• Friction becomes zero with roughness

• Friction increases with roughness