Bill Nye Simple Machines

What is the primary function of simple machines?

• To generate electricity.

• To make work easier by changing the size or direction of forces.

• To create complex mechanical systems.

• To convert chemical energy into mechanical energy.

What is the main effect of using a pulley system to lift an object?

• It increases the weight of the object.

• It changes the color of the object.

• It changes the direction of the force needed to lift the object.

• It makes the object disappear.

What are the three essential parts of a lever?

• A motor, a battery, and a switch.

• Two ends and a fulcrum.

• A spring, a gear, and a chain.

• A wheel, an axle, and a ramp.

How does a wheel relate to a lever?

• A wheel is a type of inclined plane.

• A wheel is a single, continuous lever.

• A wheel is made up of multiple levers pivoting around a central fulcrum.

• A wheel is used to measure the force of a lever.

How do bicycle gears assist a rider in climbing a steep hill?

• They increase the speed of the bicycle.

• They allow the rider to apply less effort over a longer distance.

• They reduce the friction between the tires and the road.

• They automatically adjust the rider's pedaling cadence.

What is the primary advantage of using a ramp to move an object to a higher elevation compared to lifting it straight up?

• It reduces the total work done.

• It decreases the distance the object travels.

• It requires less force to move the object.

• It eliminates friction.

What type of simple machine is a screw considered to be?

• A lever wrapped around a rod.

• A wheel and axle with a sharp edge.

• An inclined plane wrapped around a rod.

• A wedge with a rotating handle.

How do prosthetic arms and legs often achieve movement for users?

• Through direct muscle impulses from the user's remaining limb.

• By using internal motors powered by batteries.

• Via a system of cables and levers operated by the user's body movements.

• They are pre-programmed to perform a limited set of actions.

Which of the following is NOT considered a simple machine?

• Lever

• Pulley

• Engine

• Ramp

What simple machine is primarily used in cranes to lift heavy loads?

• Lever

• Pulley

• Wheel and axle

• Screw