Mechanical Advantage | MCQs

Explanation

• A movable pulley is a type of pulley system where the pulley is free to move along the rope or cable.
• This allows the force applied to the rope to be multiplied, making it easier to lift or move heavy loads.
• Movable pulleys are commonly used in cranes, winches, and other lifting machines.

Explanation

• Cranes use movable pulleys to lift and move heavy loads.
• The pulleys are attached to a cable or rope that wraps around a drum or wheel.
• It allowing the load to be lifted or moved in a vertical direction.

Explanation

A movable pulley decreases the amount of input force needed to lift a load.

By allowing the user to apply force over a longer distance.

Explanation

• A nail cutter is an example of a Second-class lever.
• Where the load (the nail) is located between the effort (the hand) and the fulcrum (the pivot point of the cutter).

Explanation

An inclined plane is a slanting surface connecting a lower level to a higher level.

It is a simple machine that helps to lift or move loads to a higher position, and is commonly used in:

• Ramps
• Staircases
• Slides
• Ski lifts
• Hilly roads

Explanation

• A wheel with a rod, called an axle, through its center lifts or moves loads.
• Example: Screw driver, handle is wheel and its shaft is axle, a car wheel.

The wheel and axle simple machine is used in many applications, such as:

• Transportation (cars, bicycles, etc.)
• Lifting heavy loads (cranes, winches, etc.)
• Moving objects (wheelbarrows, shopping carts, etc.)

Explanation

• A pulley system is commonly used to raise and lower flags.
• As it allows for a change in direction of the force and makes it easier to lift the flag to a higher position.

Explanation

• A pulley is a simple machine that uses grooved wheels and a rope to raise, lower, or move a load.
• It changes the direction of the force, making it easier to lift or move heavy loads.
• Examples: Raising a load and A flag pulley.

Explanation

• A lever is a stiff bar that rests on a support called a fulcrum, which lifts or moves loads.
• The fulcrum is the point where the lever pivots, and it can be used to change the direction of a force or to gain a mechanical advantage, making it easier to lift or move heavy loads.
• Examples: Hammer, crow bar, a pair of pilers and seesaw.

Explanation

Pulley is a wheel with a grooved rim around which a cord passes, which acts to change the direction of a force applied to the cord and is used to raise heavy weights.