Which of the following is an example of wheel and axle?

A car steering is an example of a wheel and axle because it involves a wheel (the steering wheel) that rotates an axle to control the direction of the vehicle.

Gears can do all of the following EXCEPT

Gears cannot change the fulcrum, as they are primarily used to change speed, direction, or force.

A movable pulley can

A movable pulley increases the input force, making it easier to lift heavy loads.

Which of the following use movable pulleys?

Cranes use movable pulleys to lift heavy loads with less effort.

What type of simple machine is a wheel and axle?

A wheel and axle is considered a type of lever because it rotates around a fulcrum (the axle).

In a wheel and axle system, which part acts as the fulcrum?

In a wheel and axle system, the axle acts as the fulcrum, allowing the wheel to rotate around it.

Which of these is an example of a wheel and axle?

A bicycle is an example of a wheel and axle, where the wheels rotate around the axles to move the bicycle.

In the wheel and axle system, the wheel moves a ______ distance, while the axle moves a ______ distance.

In a wheel and axle system, the wheel moves a large distance while the axle moves a small distance due to the difference in their radii.

What is a pulley used for?

A pulley is used for lifting or lowering loads by applying force to a rope or chain.

What does a basic pulley consist of?

A basic pulley consists of a wheel with a groove and a rope that runs along the groove.

Which direction of force is changed when using a fixed pulley?

A fixed pulley changes the direction of the force from downward to upward, allowing loads to be lifted.

What happens when you pull down on the rope of a simple fixed pulley?

When you pull down on the rope of a simple fixed pulley, the load goes up due to the change in direction of the applied force.

What is a movable pulley?

A movable pulley is one that moves up and down with the load, providing a mechanical advantage to lift heavy objects with less effort.

In which pulley is the effort less than the load?

In a movable pulley, the effort required to lift the load is less than the weight of the load due to the mechanical advantage it provides.

What kind of pulley is used in raising a flag on a flagpole?

A fixed pulley is used in raising a flag on a flagpole because it changes the direction of the force needed to lift the flag.

What is a combination of fixed and movable pulleys called?

A combination of fixed and movable pulleys is called a block and tackle, which provides a significant mechanical advantage for lifting heavy loads.

What is a gear?

A gear is a wheel with teeth that mesh with other gears to transmit torque and rotation.

What happens when two gears are meshed together?

When two gears are meshed together, they rotate in opposite directions due to the interlocking teeth.

When the second gear has more teeth than the first, what is increased?

When the second gear has more teeth than the first, the force is increased due to the mechanical advantage provided by the gear ratio.

When a large gear drives a smaller gear, what increases?

When a large gear drives a smaller gear, the speed of the smaller gear increases due to the gear ratio.

When a smaller gear drives a larger gear, what increases?

When a smaller gear drives a larger gear, the force increases due to the mechanical advantage provided by the gear ratio.

In a bicycle, when going uphill, which gear setting is preferred?

When going uphill on a bicycle, a low gear setting is preferred for more force to make pedaling easier.

What happens to force when speed is increased using gears?

When speed is increased using gears, the force is reduced due to the trade-off between speed and force in gear systems.

Which of these devices uses gears?

Bicycles use gears to transfer force from the pedals to the back wheel, allowing for different speeds and forces.

What simple machine system is used in a bicycle to transfer force from the pedals to the back wheel?

A bicycle uses a pulley system with a chain to transfer force from the pedals to the back wheel, allowing for efficient movement.

What part of the bicycle helps in steering the direction?

The handlebar of a bicycle helps in steering the direction by turning the front wheel.

What connects the pedals to the gear ring?

The crankarm connects the pedals to the gear ring, transferring the force from the rider's legs to the bicycle's drivetrain.

What part of the bicycle helps to stop the movement?

The brakes on a bicycle help to stop the movement by applying friction to the wheels.