True.
FALSE
false
false (APEX)
is it true or false my guess is False
false
False. Friction can significantly affect the efficiency of a machine by causing energy losses and reducing its overall performance. Minimizing friction through proper lubrication and design can help improve the efficiency of a machine.
False. Friction typically reduces the efficiency of a machine by converting some of the input energy into heat, rather than converting it into mechanical energy.
True. Friction causes resistance within a machine, leading to loss of energy in the form of heat. This decrease in efficiency can result in the machine requiring more energy input to overcome friction and perform its intended task.
False. Friction is not always undesirable. It is necessary for many everyday activities such as walking, driving, and gripping objects. However, it can also be undesirable in some situations like in machinery where it can cause wear and energy loss.
false it is rolling friction
If friction is reduced through the use of oil or another means, the mechanical advantage of the machine would typically increase. This is because less energy is lost to friction, resulting in more efficient operation and a greater output force compared to the input force.
true
False. The force needed to overcome static friction is usually greater than the force needed to overcome kinetic friction.
False. The type of friction that occurs when an object rolls over a surface is called rolling friction, not round friction. Rolling friction is caused by the deformation of the object and surface at the point of contact, which generates resistance that opposes the motion of the object.
False. The mechanical advantage of a machine can be greater than, equal to, or less than 1, depending on the type of machine and how it is designed.
False. Air resistance is friction. A meteor coming in from space hits our atmosphere and glows brightly due to the airs friction.
False. Friction is a force that resists motion, so it can make work more difficult rather than easier. Minimizing friction can help make work easier.