Exploring Simple Machines and Energy

What are the six types of simple machines?

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

• screw, lever, block, wheel, axle, chain

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

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

How does a simple machine provide mechanical advantage?

• A simple machine increases the speed of the output force without changing the input force.

• A simple machine requires a larger input force to produce a smaller output force.

• A simple machine only changes the direction of the force without providing any advantage.

• A simple machine allows a smaller input force to produce a larger output force, providing mechanical advantage.

What is the relationship between work and energy?

• Energy can be created from nothing through work.

• Work is the same as energy.

• Work is the transfer of energy through force applied over distance.

• Work is only done when energy is lost.

How does friction affect the efficiency of simple machines?

• Friction decreases the efficiency of simple machines by causing energy loss and requiring more input force.

• Friction only affects the speed of simple machines, not their efficiency.

• Friction has no effect on the efficiency of simple machines.

• Friction increases the efficiency of simple machines by reducing input force.

What is a lever and how does it work?

• A lever is a simple machine that amplifies force to lift or move loads.

• A lever is a tool used exclusively in construction.

• A lever is a complex machine that requires electricity to operate.

• A lever is a type of pulley used for lifting.

Can you give an example of a lever in everyday life?

• A bicycle pedal

• A door hinge

• A bottle opener

• A seesaw in a playground.

What type of energy is stored in a stretched rubber band?

• Kinetic energy

• Thermal energy

• Elastic potential energy

• Chemical energy

How does using a ramp reduce the effort needed to lift an object?

• A ramp increases the force needed to lift an object.

• A ramp reduces the effort needed to lift an object by allowing it to be raised over a longer distance with less force.

• A ramp allows for lifting objects only vertically.

• A ramp makes the object heavier to lift.

Why is it important to understand simple machines in our daily lives?

• They are only used in construction.

• Understanding simple machines is only for engineers.

• It is important to understand simple machines because they simplify tasks and improve efficiency in our daily lives.

• Simple machines are outdated and irrelevant today.

Which correctly describes the change in energy as a ball rolls off of a shelf?

• Potential energy decreases and kinetic energy increases

• Potential energy increases and kinetic energy decreases

• Potential energy increases and kinetic energy stays the same

• Potential energy stays the same and kinetic energy decreases