9.2 Simple machines with rotating parts

What is the primary function of a single fixed pulley?

• Decrease the effort force.

• Lift heavy objects with ease.

• Change the direction of the force.

• Add mechanical advantage.

How does adding more pulleys to a pulley system affect the mechanical advantage?

• It decreases the mechanical advantage.

• It has no effect on the mechanical advantage.

• It increases the mechanical advantage.

• It changes the direction of force.

Why are pulleys commonly used on sailboats?

• To change the direction of force.

• To add mechanical advantage.

• To decrease the effort force.

• To hold sails high in the air.

What is the purpose of gears in a gear system?

• To increase the distance the system moves.

• To change the direction of motion.

• To decrease the force applied.

• To transmit force from one wheel to another.

In a gear system, when the driving gear is larger than the driven gear, what type of multiplier is it?

• Speed multiplier

• Force multiplier

• Directional multiplier

• Load multiplier

How does a speed multiplier in a gear system work?

• The driving gear is smaller, resulting in higher speed.

• The driving gear is smaller, resulting in slower speed.

• The driving gear is larger, resulting in higher speed.

• The driving gear is larger, resulting in slower speed.

What is a real-life example of a gear system that serves as a speed multiplier?

• Hand beater

• Mountain bike

• Clock

• None of the above

In a gear system, when the driving gear is smaller than the driven gear, what type of multiplier is it?

• Speed multiplier

• Force multiplier

• Directional multiplier

• Load multiplier

How does a force multiplier in a gear system work?

• The driving gear is smaller, resulting in higher force.

• The driving gear is smaller, resulting in lower force.

• The driving gear is larger, resulting in higher force.

• The driving gear is larger, resulting in lower force.

Which type of gear system is commonly found in mountain bikes to provide mechanical advantage?

• Speed multiplier

• Force multiplier

• Directional multiplier

• Load multiplier