Simple Machines

What is a wedge?

• A type of fruit that grows on trees.

• A simple machine used to split or cut objects apart, consisting of two inclined planes.

• A tool used for measuring angles.

• A type of fastener used in construction.

How does friction affect the use of simple machines?

• Friction decreases the amount of force needed to move an object, making simple machines more effective.

• Friction has no effect on the use of simple machines.

• Friction can increase the amount of force needed to move an object, making simple machines less effective.

• Friction only affects complex machines, not simple machines.

What is mechanical advantage?

• The ratio of the output force produced by a machine to the input force applied.

• The total energy consumed by a machine during operation.

• The speed at which a machine operates compared to manual effort.

• The amount of work done by a machine in a given time.

Can simple machines change the amount of work done?

• Yes, they can increase the amount of work done.

• No, simple machines do not change the amount of work done; they only change the way work is done by altering force and distance.

• Yes, they can decrease the amount of work done.

• No, they only make work easier without changing the amount of work done.

What are the six types of simple machines?

• lever, inclined plane, wheel and axle, pulley, screw, and wedge

• lever, gear, wheel, axle, pulley, and spring

• lever, inclined plane, wheel, axle, pulley, and chain

• lever, inclined plane, wheel and axle, pulley, and block

What is the trade-off when using a simple machine?

• The input force is increased while the distance is decreased.

• The input force is decreased while the distance is increased.

• The input force remains the same while the distance is halved.

• The input force is doubled while the distance is unchanged.

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 does it mean to change the direction of a force?

• It means to increase the strength of the force applied.

• It means using a machine to redirect the force applied, making it easier to move an object.

• It means to decrease the distance over which the force is applied.

• It means to apply the force in the opposite direction.

What is a wheel and axle?

• A type of gear used in machinery.

• A simple machine that consists of a larger wheel attached to a smaller axle, allowing for easier movement.

• A device used for lifting heavy objects.

• A mechanism that converts rotational motion into linear motion.

How does an inclined plane make work easier?

• It allows objects to be lifted straight up with no effort.

• It reduces the amount of effort needed to lift an object by allowing it to be moved over a longer distance at a lower height.

• It increases the weight of the object being lifted.

• It requires more force to move the object over a shorter distance.