Question

Ramya and Vijay are bicycling in their backyard while their Dad is trimming bushes using a pair of shears. Their Mom is collecting the fallen leaves and other garbage using a garden-rake and then finally transfers them into a wheelbarrow. Meanwhile, in the kitchen, their Grandma is cracking some walnuts using a nutcracker for their evening snack.

1. Identify and list the simple machines present in the scene.
2. Identify and briefly explain which ones are levers in them.
3. Identify the class which each of the levers belong to.

Answer 1

1. The simple machines present in the given scene are: $\text{the pair of shears},$ $\text{the garden-rake},$ $\text{the wheelbarrow},$ and $\text{the nutcracker}$.


2. All of the simple machines in the scene, i.e. $\text{the pair of shears},$ $\text{the garden-rake},$ $\text{the wheelbarrow}$, and $\text{the nutcracker}$ are levers.


3. The pair of shears are $\text{class}1$ levers. The garden-rake belongs to the $\text{class}3$ lever whereas the nutcracker and the wheelbarrow belong to $\text{class}2$.