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Description
Flashcards by Ahmed Almohammed, updated more than 1 year ago
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Created by Ahmed Almohammed
over 7 years ago
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| Question | Answer |
| What are ramps? | Ramps are inclined planes used to help lift an object. |
| What are inclined planes? | Inclined planes are simple machines that reduce the effort needed to lift a load by increasing the distance it acts. |
| How do ramps make climbing easier? | Ramps make climbing easier by reducing the effort force needed.They do this by making you travel over a long distance. |
| Why is it that the roads and tracks through mountain ranges ar usually twisted and winding? | This is because by travelling a greater distance over a winding road,you can climb the mountain using less effort force. |
| Why would loading objects in a truck be almost impossible without the use of a ramp? | This is because when we use a ramp, we use a smaller force over a longer distance in loading objects into a truck. |
| What are wedges? | A wedge is a double inclined plane that moves through another object. |
| How does a wedge work? | A wedge changes the direction of a force,enabling an object to be split.The longer the inclined edge of a wedge and the sharper it is, the easier the object is to split. |
| How can you find the mechanical advantage of a ramp? | |
| A crate of weight 600N is pushed with an effort force of 120N up a 15-metres ramp in length and 3-metres in height. Calculate the Mechanical Advantage of this ramp. | |
| Given that the load is the weight of the crate,which is 600N, calculate the size of the effort force required to push the crate up this ramp. | |
| What does a zip consist of? | A zip consists of two sets of interlocking teeth and it is very strong when fastened. |
| How many wedges does the slide of a zipper use? | The slide of a zipper uses three wedges. |
| What do the collection of wedges in a zipper slide do? | A central wedge unlatches the teeth as the zip is undone and side wedges force the teeth together when the zip is done up. |
| What is a screw? | A screw is a spiral inclined plane that winds around a metal cylinder. |
| What are the different types of screws that cut through different materials? | Wood screw cut through timber, boat propellers are screws that cut through water and aircraft propellers are screws that cut through the air. |
| Why do you use less force when using a screwdriver than using a hammer? | This is because the screw is moved a greater distance through the object when screwed into place. |
| What is the difference between a screw with a small pitch and a screw with a large pitch? | A screw with a small pitch is easy to screw into a piece of wood, but it must be turned many times. A screw with a large pitch takes fewer turns to be inserted into a wood, but it requires more force than the previous screw. |
| What's another name for a spear thrower? | Woomera |
| What are the types of stones that were best suited for producing flakes? | The types of stone that were best suited to producing flakes were those rich in silica, such as quartz and flint. |
| What was used to attach a cutting stone to a piece of wood as a handle? | Resins were used to attach a cutting stone to a piece of wood as a handle. |
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