A dolly is a type of simple machine known as a wheel and axle. The wheels reduce friction, making it easier to move heavy objects by allowing them to roll.
A roof is not a simple machine. It is a structure built to provide shelter and protection from the elements.
A pin is classified as a type of fastener and not a simple machine. It is often used to secure two materials together.
A tack is a type of wedge, which is a simple machine that is used to push things apart or hold things together.
A projector screen is a type of lever simple machine when it is manually pulled down or rolled up. It can also be considered a pulley simple machine if it is motorized to retract or extend the screen.
A bulb is not a simple machine; it is an electrical device that produces light. Simple machines include levers, pulleys, inclined planes, screws, wedges, and wheels and axles.
Dolly
A pulley isn't a kind of simple machine, it is a simple machine
A train is not a simple machine.
IT's NOT A SIMPLE MACHINE!
its not a simple machine
A dolly is a type of simple machine known as a lever. It typically consists of a platform mounted on wheels, allowing users to easily move heavy objects by distributing their weight and reducing the effort required to lift and carry them. By using the principle of leverage, a dolly makes transporting items more efficient and manageable.
It is a simple lever.
Rope is not a simple machine on its own, it's a simple machine on a wheel and axle, then it's a pulley.
a compound machine is a combination of simple machines
lever
lever
It's a simple machine.