Exploring Basic Mechanical Principles

What are the six types of simple machines?

• lever, wheel, axle, spring, wedge, ramp

• lever, pulley, inclined plane, block, gear, wheel

• lever, wheel and axle, pulley, inclined plane, screw, wedge

• gear, lever, wheel, axle, pulley, block

How does a lever work to lift a load?

• A lever works by pushing the load directly without a fulcrum.

• A lever operates by creating friction to lift the load.

• A lever works by using a fulcrum to amplify an applied force, allowing a smaller effort to lift a larger load.

• A lever requires equal weights on both sides to function properly.

What is the formula for calculating force?

• F = m * a

• F = m - a

• F = m + a

• F = m / a

What is the difference between speed and velocity?

• Speed is scalar; velocity is vector (includes direction).

• Speed can be negative, while velocity cannot.

• Velocity measures distance only, not direction.

• Speed is always greater than velocity.

What type of energy is stored in a compressed spring?

• Thermal energy

• Kinetic energy

• Chemical energy

• Elastic potential energy

What is kinetic energy?

• Kinetic energy is the energy stored in an object at rest.

• Kinetic energy is the energy of an object in motion.

• Kinetic energy is the energy released during a chemical reaction.

• Kinetic energy is the energy associated with an object's temperature.

How do you calculate work done on an object?

• Work = Force + Distance

• Work = Energy × Time

• Work = Force × Distance × cos(θ)

• Work = Mass × Acceleration

What is the unit of power?

• joule

• watt

• ohm

• volt

What is the principle of conservation of energy?

• Energy cannot be created or destroyed, only transformed.

• Energy can be created and destroyed.

• Energy can be freely generated from nothing.

• Energy is only lost in transformations.

How does friction affect motion?

• Friction opposes motion and can slow down or stop moving objects.

• Friction increases the speed of moving objects.

• Friction has no effect on motion.

• Friction only occurs in liquids and gases.