When do you need friction?

Answer 1

You can't say for definite but in general, 2 very lumpy, rough surfaces rubbed really hard against each other would create the most friction.

Answer 2

Friction is needed in various situations, such as for walking and driving to prevent slipping, and for stopping or slowing down moving objects. It also plays a crucial role in machinery and equipment to ensure proper function and efficiency. In general, friction is essential for tasks that require traction, control, or resistance to motion.

Answer 3

so you could slow down a car or write with a pencil
in walking

for nailing

for braking

for slowing down something that is rolling

Answer 4

When one object rolls over another object, like when the wheel of a car rolls over the ground.

Answer 5

when braking