Answer: answer is in explanation
Explanation:
A doorknob - about 10cm for diameter and the force that causes the torque comes from the person turning the doorknob causing friction. It’s used to open and close doors.
A screwdriver- 2m for diameter and the force that causes the torque comes from the person applying pressure and causing the screwdriver to turn with friction. It’s used to screw a screw into the wall or into an object.
Car wheels- about 12inches in diameter and the force that causes the torque comes from the engine’s chemical force and friction against the road. They’re used to make a car go and stop.
Electric fan- 14 inches in diameter and the force for torque comes from the electricity circulating from the fan making it spin to provide the air coming out of the fan. They’re used to provide people with air as a cooling system.
Pizza cutter- 10cm in diameter and the force for torque comes from the pressure being applied on the handle and the friction between the pizza and the pizza cutter. They’re used to cut pizza.
Winch
Analog clock
Windmill
Water wheel
Skateboard