Ball bearings, oil, lubricant. Pretty much anything that reduces the friction between two interacting surfaces.
Surfaces that are smooth and lubricated will typically produce the least amount of friction. Examples include ice, polished metal, and Teflon-coated surfaces. Friction can also be reduced by decreasing the weight pressing the surfaces together.
Using lubricants such as oil or grease to reduce friction between surfaces. Using ball bearings or roller bearings to minimize friction in rotating components. Polishing or smoothing the surfaces in contact to reduce roughness and friction. Maintaining proper alignment and spacing between moving parts to decrease friction. Applying a low-friction coating, such as Teflon, to surfaces to reduce friction.
Decreasing the block in contact with the table reduces the normal force acting on the block, which in turn decreases the frictional force. This results in a lower kinetic friction force between the block and the table.
Activities that require increasing friction can include using sandpaper to roughen a surface or tightening the grip of shoes with a shoelace. Activities that involve decreasing friction can include applying lubricant to machine parts or gliding on ice skates with a thin layer of water on the ice.
Types of friction include static friction (sliding), kinetic friction (rolling), and fluid friction (fluid). Examples of sliding friction include pushing a heavy box across the floor, rolling friction is experienced when a ball rolls on the ground, and fluid friction occurs when swimming in water.
machine tool
Golf
Surfaces that are smooth and lubricated will typically produce the least amount of friction. Examples include ice, polished metal, and Teflon-coated surfaces. Friction can also be reduced by decreasing the weight pressing the surfaces together.
friction
Using lubricants such as oil or grease to reduce friction between surfaces. Using ball bearings or roller bearings to minimize friction in rotating components. Polishing or smoothing the surfaces in contact to reduce roughness and friction. Maintaining proper alignment and spacing between moving parts to decrease friction. Applying a low-friction coating, such as Teflon, to surfaces to reduce friction.
Important factors in decreasing Kinetic Energy are Gravity and 'drag' from Friction.
applying a brake
Decreasing the block in contact with the table reduces the normal force acting on the block, which in turn decreases the frictional force. This results in a lower kinetic friction force between the block and the table.
mop used for washing floors
Examples of SLIDING FRICTION is pushing a heavy rock in your path, or moving a box on the floor.
smooth surfaces rollerblades cooking spray in pans
Activities that require increasing friction can include using sandpaper to roughen a surface or tightening the grip of shoes with a shoelace. Activities that involve decreasing friction can include applying lubricant to machine parts or gliding on ice skates with a thin layer of water on the ice.