Levers

What is a lever?

• A type of pulley used to lift heavy objects.

• A simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum.

• A device that converts rotational motion into linear motion.

• A tool used for measuring angles.

What is the difference between ideal mechanical advantage (IMA) and actual mechanical advantage (AMA)?

• IMA is the mechanical advantage in a frictionless scenario, while AMA accounts for friction and other losses.

• IMA is always greater than AMA due to the presence of friction.

• AMA is the theoretical maximum efficiency of a machine, while IMA is the real-world performance.

• Both IMA and AMA are the same in all scenarios.

What is an example of a third class lever in everyday life?

• A fishing rod

• A pair of tweezers

• A wheelbarrow

• A seesaw

What is an example of a second class lever in everyday life?

• A wheelbarrow

• A pair of scissors

• A seesaw

• A fishing rod

What is the significance of the IMA being less than one?

• It indicates that the lever is designed to increase speed or distance rather than force.

• It means the lever is not effective at all.

• It shows that the lever can lift heavier weights with less effort.

• It suggests that the lever is only useful for short distances.

What is the unit of force?

• Pound

• Newton

• Joule

• Pascal

What type of lever is a pair of tweezers?

• A first class lever.

• A second class lever.

• A third class lever.

• A fourth class lever.

What is the formula for calculating the mechanical advantage (MA) of a lever?

• MA = Load / Effort.

• MA = Effort / Load.

• MA = Load + Effort.

• MA = Load - Effort.

What type of lever is a seesaw?

• A first class lever.

• A second class lever.

• A third class lever.

• A compound lever.

What type of lever is a wheelbarrow?

• A first class lever.

• A second class lever.

• A third class lever.

• A compound lever.