Reyna kicks a ball, which then rolls across a grassy field. Which is the best explanation for why the ball eventually comes to a stop?
air resistancefluid✔ rollingslidingstatic
✔ air resistancefluidrollingslidingstatic
air resistancefluidrollingsliding✔ static
Identify the type of friction acting in each scenario.
Which factors affect friction between two solid surfaces? Select two options.the weight of the objectsthe surface area of the objectsthe shape of the objectsthe roughness of the objects’ surfaces
Which of these actions will increase friction? Select three options.scratching a surface to make it rougherpolishing a surface to make it smootherincreasing the size of a flying objectadding extra weight to an objectplacing oil between two surfaces
Ivan pushes a dresser with full drawers across his carpeted floor. What could Ivan do to reduce the amount of friction between the dresser and the floor? Select two options.place some smooth tiles under the dresserremove or turn off sources of windmove the dresser at a slower speedremove the drawers from the dresser
The box is at rest on the table. Which force is represented by vector A?
The net force acting on the box is 18 N. What is the force of friction?
air resistance✔ fluidrollingslidingstatic
Provide at least three reasons why friction is needed.
Friction allows people and objects to move. It provides traction for an object to start moving or change direction. It can also give people a better grip on objects. Finally, friction keeps objects in place when they are set down.
Provide at least two negative effects of friction, and explain how friction can be reduced.
Friction can cause overheating in parts that rub together. It can also cause these parts to wear out. Polish, oil, and nonstick surfaces can decrease friction to make moving parts last longer and prevent overheating.
What did you include in your response? Check all that apply.
What did you include in your response? Check all that apply.
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