Question

Following are six levers, you need to categorize them into three groups. Give a reason for putting each of the levers into the group of your choice.

1. Scissors, 2. Ice tongs, 3. Nutcracker, 4. Wheelbarrow, 5, Crowbar, 6. Fishing rod.

Answer 1

Scissors and nutcracker are categorized as the first group because they function as double-lever systems. Crowbar and ice tongs are categorized as the second group because they function as a lever of the first class. Wheelbarrow and fishing rod are categorized as the third group because they function as levers of the third class.

Step-by-step explanation:

The levers can be categorized into three groups as follows:

1. First Group: Scissors and Nutcracker
2. Second Group: Crowbar and Ice Tongs
3. Third Group: Wheelbarrow and Fishing Rod

I would categorize scissors and nutcracker as the first group because they both function as double-lever systems. Scissors have two blades that act as the input and output forces on opposite sides of the fulcrum, while a nutcracker has two handles that work in a similar way.

I would categorize crowbar and ice tongs as the second group because they both function as a lever of the first class. In a lever of the first class, the fulcrum is located between the input and output forces. Crowbars have a pivot point at one end and a flat surface at the other for applying a force to lift or separate objects. Ice tongs have two arms that are connected at a pivot point and can be squeezed together to grip and lift ice or other objects.

I would categorize a wheelbarrow and fishing rod as the third group because they function as levers of the third class. In a lever of the third class, the input force is located between the fulcrum and the output force. A wheelbarrow has a wheel as the fulcrum, and the user applies the input force by pushing down on the handles to lift and move heavy loads. A fishing rod has the reel as the fulcrum, and the user applies the input force by casting or reeling in the line to catch fish.