Understanding Simple Machines

What are the six types of simple machines?

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

• lever, pulley, inclined plane, block, gear, wheel

• gear, lever, wheel, axle, pulley, block

• lever, wheel, axle, spring, wedge, ramp

How does a simple machine provide mechanical advantage?

• A simple machine allows a smaller input force to move a larger load, providing mechanical advantage.

• A simple machine requires a larger input force to move a smaller load.

• A simple machine does not change the amount of work done, only the speed.

• A simple machine increases the weight of the load being moved.

What is the formula for calculating mechanical advantage?

• MA = Force x Distance

• MA = Input Force / Output Force

• MA = Output Work / Input Work

• MA = Output Force / Input Force

What is a lever and how does it work?

• A lever is a type of pulley used for lifting heavy objects.

• A lever is a simple machine that amplifies force to lift or move loads.

• A lever is a complex machine that requires electricity to operate.

• A lever is a tool used exclusively in construction for measuring distances.

Name the three classes of levers and give an example of each.

• First-class lever example: Hammer;

• Third-class lever example: Pliers.

• First-class lever example: Seesaw; Second-class lever example: Wheelbarrow; Third-class lever example: Tweezers.

• Second-class lever example: Scissors;

In which class of lever is the load located between the effort and the fulcrum?

• Class 2 lever

• Class 4 lever

• Class 3 lever

• Class 1 lever

What is the purpose of a pulley as a simple machine?

• The purpose of a pulley is to make lifting easier by changing the direction of the force applied.

• To increase the weight of the load being lifted.

• To store energy for later use.

• To reduce the friction in a mechanical system.

How does an inclined plane reduce the effort needed to lift an object?

• An inclined plane reduces the effort needed to lift an object by allowing it to be moved along a slope, requiring less force.

• It allows the object to be lifted straight up without any slope.

• It requires more force to lift the object compared to lifting it vertically.

• It increases the weight of the object being lifted.

What is the difference between a fixed pulley and a movable pulley?

• A fixed pulley is stationary and changes the direction of force, while a movable pulley moves with the load and reduces the effort needed to lift it.

• A fixed pulley requires more effort to lift than a movable pulley.

• A fixed pulley can lift loads vertically, while a movable pulley can only lift loads horizontally.

• A fixed pulley is used only for heavy loads, while a movable pulley is for lighter loads.

Can you give an example of a real-life application of a simple machine?

• A bicycle is a real-life application of a wheel and axle.

• A ramp is a real-life application of a pulley.

• A hammer is a real-life application of a wedge.

• A seesaw is a real-life application of a lever.