Answer:
1. teeter-totters
first class levers
a seesaw.
2. wheelbarrows
second class lever.
a small cart with a single wheel at the front and two supporting legs and two handles at the rear, used typically for carrying loads in building-work or gardening.
3.scissors
first-class double-lever
cutting instrument consisting of a pair of opposed metal blades that meet and cut when the handles at their ends are brought together. The term shears sometimes denotes large-size scissors.
4. pliers
first class levers
hand-operated tool for holding and gripping small articles or for bending and cutting wire. Slip-joint pliers have grooved jaws, and the pivot hole in one member is elongated so that the member can pivot in either of two positions in order to grasp objects of different size in the most effective way.
5. bottle openers
second-class lever
a tool used to remove metal tops from some bottles
Explanation:
