Simple Machines Assessment Mcfadden Pd1 15-16

An inclined plane is a slanted surface that is used to raise an object. It allows for the object to be moved up or down with less force compared to lifting it straight up. This simple machine is commonly used in various applications, such as ramps, stairs, and even wheelchair access ramps. It reduces the amount of effort required to move an object vertically by increasing the distance over which the force is applied. Therefore, an inclined plane is the correct answer for this question.

A simple machine is a device that can perform work with only one movement and can change the size and direction of a force. It is a basic mechanical device that makes work easier by multiplying, redirecting, or changing the applied force. Examples of simple machines include levers, pulleys, inclined planes, screws, wedges, and wheels and axles. These machines have been used for centuries to accomplish various tasks and are the building blocks of more complex machines.

A bar that is free to pivot about a fixed point is called a lever. A lever is a simple machine that consists of a rigid object (in this case, the bar) and a fulcrum (the fixed point). By applying a force at one end of the lever, the object on the other end can be moved or lifted. The lever allows for the amplification or redirection of force, making it a useful tool in various applications.

Efficiency is the correct answer because it represents the ratio of the work output of a machine to the work input. It measures how effectively a machine converts input energy into useful output energy. A higher efficiency indicates that the machine is able to minimize energy losses and maximize useful work output. Power refers to the rate at which work is done, effort refers to the force applied to do work, and resistance refers to the opposition to the flow of current in an electrical circuit.

The correct answer is "mechanical advantage" because it refers to the amount by which a machine amplifies or multiplies the effort force applied to it. It is a measure of how much easier a machine makes it to do work, by reducing the amount of effort force required to overcome a resistance force. The mechanical advantage of a machine can be calculated by dividing the resistance force by the effort force.

A wedge is formed by putting two inclined planes together. It is a simple machine that is used to separate or lift objects. The shape of a wedge allows it to apply a concentrated force to a small area, making it easier to split or cut through materials. Examples of wedges include knives, axes, and doorstops.

A screw is a type of inclined plane wrapped around a cylindrical post. When the screw is rotated, it moves along the inclined plane, allowing it to lift or hold objects in place. The threads on the screw create a spiral shape, which provides mechanical advantage and makes it easier to drive the screw into a material or to lift heavy loads. Therefore, the correct answer is screw.

A compound machine refers to the combination of two or more simple machines working together. It is a device that utilizes the mechanical advantage of multiple simple machines to perform a specific task. In this case, a compound machine can be formed by combining different simple machines such as pulleys, wheels and axles, and levers.

A lever with a mechanical advantage greater than 1 is used to decrease effort force. This means that with the lever, less force is required to achieve the same amount of work compared to using just the effort force alone. The lever amplifies the force applied, making it easier to overcome resistance or lift heavy objects.

The wedge is the only simple machine in the list that does not involve rotational motion. It is used for splitting or cutting objects by applying force in a linear direction, whereas the lever, pulley, and wheel and axle all involve rotational motion to transmit or amplify force.

A block and tackle is a system of pulleys designed to reduce the effort force. It consists of multiple pulleys, both fixed and movable, arranged in a way that allows for increased mechanical advantage. By distributing the load across multiple pulleys, the force required to lift or move heavy objects is reduced. This makes it easier for individuals to exert less effort while accomplishing tasks that require significant force.

The correct answer is a gear and a wheel and axle. A gear is a simple machine that consists of toothed wheels that interlock to transmit force and motion. In a bicycle, gears are used to change the speed and torque of the wheels. A wheel and axle is another simple machine where a wheel is attached to a shaft or axle, allowing for the rotation of the wheel. In a bicycle, the wheels and axles allow for smooth movement and efficient transfer of power from the rider to the bike.

The pulley and the wheel and axle are variations of the lever because they both involve a rotating motion around a fixed point. In a pulley, a rope or chain is wrapped around a wheel, which allows for lifting or moving heavy objects with less force. In a wheel and axle, a wheel is attached to a rod or axle, and when force is applied to the wheel, it rotates around the axle, allowing for the movement of objects. Both of these simple machines use the principle of leverage to make tasks easier.

The correct answer is "the pulley changes only the direction of the effort force." A single fixed pulley does not change the size, speed, or direction of the effort force. It only changes the direction of the force applied. The effort force required to lift an object with a single fixed pulley is the same as the weight of the object being lifted.

A simple machine is a mechanical device that can change the direction of a force, decrease the time it takes to do work, and transfer energy from one location to another. However, it cannot increase the amount of work being done. This is because a machine can only transform or transfer energy, but it cannot create or add energy to a system. Therefore, increasing the amount of work being done would require additional energy input, which a simple machine cannot provide.

A machine that changes only the direction of a force has an MA of 1 because it does not change the magnitude of the force. The mechanical advantage (MA) is calculated by dividing the output force by the input force. In this case, since the machine only changes the direction of the force, the output force is the same as the input force. Therefore, the MA is 1, indicating that there is no mechanical advantage gained in terms of force amplification.

The given equation for IMA (Ideal Mechanical Advantage) is IMA = Effort Distance/Resistance Distance. In this case, the equation is not provided, but based on the given information, it can be inferred that the IMA is equal to 3. This is because the equation for IMA is not given, but the equation for efficiency is given, which is Efficiency = Wout/Win x 100. Since the efficiency is not mentioned, it can be assumed that the system is ideal and the efficiency is 100%. Therefore, since the Win (input work) is equal to Wout (output work), the IMA is equal to 3.

The IMA (Ideal Mechanical Advantage) for a pulley system is the ratio of the output force to the input force. In this case, the IMA is 2, which means that the system can multiply the input force by a factor of 2. This is because the pulley system consists of two pulleys, which allows for a mechanical advantage of 2.

System B will require the greatest effort distance to raise the resistance force 1 meter. The effort distance is the distance over which the effort force is applied. In System B, the effort force is applied to a smaller radius pulley compared to System A. According to the principle of mechanical advantage, a smaller radius pulley requires a greater effort distance to raise the resistance force the same distance. Therefore, System B will require the greatest effort distance.

A first-class lever is a type of lever where the fulcrum is located between the effort and the load. In Lever A, the fulcrum is positioned between the effort and the load, making it a first-class lever. Lever B and Lever C do not have the fulcrum in the middle, so they are not first-class levers.

A second class lever is a lever where the load is located between the fulcrum and the effort. In the given options, Lever B is the only lever where the load is placed between the fulcrum and the effort. Therefore, Lever B is the second class lever.

Lever C is a third class lever because in a third class lever, the effort force is applied between the fulcrum and the load. In this case, Lever C has the fulcrum at one end, the load in the middle, and the effort force applied at the other end. Therefore, Lever C fits the definition of a third class lever.

Lever A has the largest mechanical advantage because mechanical advantage is determined by the ratio of the output force to the input force. In this case, Lever A is the correct answer because it has the longest distance between the fulcrum and the point where the input force is applied, which results in a larger output force compared to the input force.

A second class lever is a type of lever where the load is situated between the fulcrum and the effort. In the case of a wheelbarrow, the fulcrum is the wheel, the effort is applied by the person pushing the handles, and the load is placed in the bin. When the person pushes down on the handles, the wheelbarrow pivots on the wheel, allowing the load to be lifted and moved. Therefore, the wheelbarrow is an example of a second class lever.

A fishing pole is an example of a third class lever because the effort force (applied by the angler's hand) is located between the fulcrum (the point where the pole pivots) and the load (the fish or resistance being lifted). In a third class lever, the effort force is closer to the fulcrum than the load, resulting in increased speed and range of motion but decreased force. In the case of a fishing pole, the angler exerts a force on the pole closer to their hand, allowing them to cast the line further and with more precision.

Lever B has the largest mechanical advantage because it has a longer distance between the fulcrum and the point where the input force is applied. A longer distance results in a greater mechanical advantage, meaning that less input force is required to overcome a larger output force.

The letter A represents the resistance force.

The letter D represents the effort distance.

The work input of the simple machine can be calculated using the formula W = F x D, where W is the work input, F is the effort force, and D is the effort distance. In this case, the effort force is given as 2.5 N and the effort distance is given as 0.10 meters. Plugging these values into the formula, we get W = 2.5 N x 0.10 m = 0.25 Nm. Therefore, the work input of the simple machine is 0.25 Nm.

The statement is false because the ideal mechanical advantage (IMA) and the actual mechanical advantage (AMA) are not always the same. The IMA is the theoretical advantage gained by using a machine, while the AMA is the actual advantage taking into account factors like friction and inefficiencies. In reality, machines are never 100% efficient, so the AMA is always less than the IMA. Therefore, the ideal mechanical advantage and the actual mechanical advantage will not always be the same.

The statement is false because the work input of a simple machine with an actual mechanical advantage greater than 1 can be equal to or smaller than the work output. The actual mechanical advantage is calculated by dividing the output force by the input force, and it represents the ratio of the forces involved. If the output force is larger than the input force, the actual mechanical advantage will be greater than 1. However, this does not necessarily mean that the work input will always be larger than the work output. The work input depends on both the force and the distance over which the force is applied, while the work output depends on the force exerted by the machine and the distance it moves the load.

The work output can be calculated using the formula Wout = Fr x Dr, where Fr is the resistance force and Dr is the resistance distance. In this case, the resistance force is given as 3.15 Newtons and the resistance distance is given as 0.85 meters. Plugging these values into the formula, we get Wout = 3.15 x 0.85 = 2.6775. Rounding this to two decimal places, the work output will be approximately 2.68.

The statement is false because the comparison between work output and work input is the actual mechanical advantage, not the ideal mechanical advantage. The ideal mechanical advantage is calculated based on the physical dimensions of a machine, while the actual mechanical advantage takes into account factors such as friction and inefficiencies in the machine.

To increase the Mechanical Advantage of an inclined plane, you can either increase the length or decrease the height. This is because Mechanical Advantage is calculated by dividing the length of the inclined plane by its height. By increasing the length, the inclined plane becomes longer, allowing for a longer distance over which the force is applied, resulting in a greater Mechanical Advantage. On the other hand, by decreasing the height, the inclined plane becomes less steep, reducing the effort required to move an object along it, again resulting in a greater Mechanical Advantage.