Which of the following is contained in a shovel?
inclined plane and a wedge
wedge and lever
wedge and pulley
pulley and inclined plane
Its B ⚡
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To determine which of the options is contained in a shovel, we need to understand what each of these components is and how they relate to a shovel.
1. Inclined plane: An inclined plane is a flat surface that is tilted at an angle. It makes it easier to move objects by reducing the amount of force needed to lift or lower them. In the context of a shovel, an inclined plane is present in the blade or scoop part of the shovel. When the blade is inserted into the ground and lifted, the inclined plane helps to push the soil or material upwards.
2. Wedge: A wedge is a simple machine that has at least one slanting side. It is typically used for splitting objects apart or for holding things in place. In the context of a shovel, a wedge is an important component found in the blade. The shape of the blade acts as a wedge, helping to penetrate and break apart the material being shoveled.
3. Lever: A lever is a rigid bar that pivots around a fixed point called a fulcrum. It provides a mechanical advantage by magnifying the input force. While levers are commonly found in many tools, such as a crowbar, they are not typically present in shovels.
4. Pulley: A pulley is a wheel with a groove that holds a rope or cable. Pulleys are used to change the direction or magnitude of a force, making it easier to lift heavy objects. However, pulleys are not typically found in shovels.
Now, looking at the options:
- Option 1: Inclined plane and a wedge. This option is correct because both an inclined plane and a wedge are present in a shovel. The inclined plane is the blade or scoop, while the wedge is the shape of the blade.
- Option 2: Wedge and lever. This option is incorrect because while a wedge is present, a lever is not typically found in a shovel.
- Option 3: Wedge and pulley. This option is incorrect because while a wedge is present, a pulley is not typically found in a shovel.
- Option 4: Pulley and inclined plane. This option is incorrect because while an inclined plane is present, a pulley is not typically found in a shovel.
Therefore, the correct option is: inclined plane and a wedge.