Mastering Levers and Mechanical Advantage in Simple Machines

This video tutorial explains the concept of levers as simple machines that allow work to be done with less effort by multiplying the input force. It covers the mechanical advantage of levers, the role of the fulcrum, and how torque is balanced on both sides of the lever. The video also provides examples of lever mechanics and introduces other simple machines like the ram, incline plane, screw, and pulley system.

What is the primary function of a lever as a simple machine?

• To multiply the force applied

• To decrease the weight of an object

• To change the direction of a force

• To increase the speed of an object

How is the mechanical advantage of a lever calculated?

• By dividing the input force by the output force

• By multiplying the input force by the output force

• By adding the input force to the output force

• By dividing the output force by the input force

In the example given, if the input force is 100 newtons and the input distance is 4 feet, what is the output force if the output distance is 1 foot?

• 100 newtons

• 200 newtons

• 300 newtons

• 400 newtons

What is the trade-off when using a lever to multiply force?

• The lever becomes heavier

• The force must be applied over a longer distance

• The lever becomes less stable

• The force must be applied over a shorter distance

If the fulcrum is placed in the middle of a lever, what is the mechanical advantage?

• Zero

• Four

• One

• Two

In the second example, if the input distance is 10 times the output distance, what is the mechanical advantage?

• 10

• 20

• 5

• 15

What happens to the output force if the input force is applied at a longer distance from the fulcrum?

• The output force remains the same

• The output force increases

• The output force decreases

• The output force becomes zero

Which of the following is NOT a simple machine mentioned in the video?

• Pulley

• Hydraulic lift

• Electric motor

• Incline plane

What is the role of the hydraulic lift system in simple machines?

• To increase the speed of an object

• To change the direction of force

• To multiply forces using fluids

• To decrease the force applied

Which simple machine uses a wheel and axle to multiply force?

• Pulley

• Lever

• Screw

• Incline plane