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Which simple machine has a flat surface that is raised at one end?
A.
Pulley and lever
B.
Lever
C.
Inclined plane
D.
Wedge
E.
Force
Correct Answer
C. Inclined plane
Explanation An inclined plane is a simple machine that consists of a flat surface that is raised at one end. It is used to reduce the amount of force needed to move an object by increasing the distance over which the force is applied. By using an inclined plane, the force required to move an object is spread out over a longer distance, making it easier to overcome the force of gravity and move the object.
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2.
The fixed point that the bar of a lever moves around is called the?
A.
Lever
B.
Pulley
C.
Pulley and lever
D.
Screw
E.
Wedge
Correct Answer
A. Lever
Explanation The fixed point that the bar of a lever moves around is called the "lever." A lever is a simple machine that consists of a rigid bar or beam that pivots on a fixed point called the fulcrum. When a force is applied to one end of the lever, it can be used to move or lift objects on the other end. The fulcrum acts as a pivot point, allowing the lever to rotate and amplify the force applied. Therefore, the correct answer is "lever."
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3.
Which simple machine has a wheel with a rope wrapped around it?
A.
Inclined plane
B.
Lever
C.
Wedge
D.
A Pulley
E.
Force
Correct Answer
D. A Pulley
Explanation A pulley is a simple machine that consists of a wheel with a rope or cable wrapped around it. When force is applied to one end of the rope, it can be used to lift or move heavy objects. Pulleys are commonly used in various systems, such as elevators and cranes, to make lifting and moving objects easier.
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4.
Which simple machines help us lift a heavyweight?
A.
Wedge
B.
Wheel
C.
Axle
D.
Pulley and lever
E.
Fulcrom
Correct Answer
D. Pulley and lever
Explanation A pulley and lever are both simple machines that can help us lift a heavyweight. A pulley is a wheel with a groove that a rope or cable can run through, and it can be used to lift heavy objects by changing the direction of the force applied. A lever is a rigid bar that pivots on a fulcrum, and it can also be used to lift heavy objects by applying a smaller force over a larger distance. By using a combination of pulleys and levers, we can effectively lift heavy weights with less effort.
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5.
Which simple machine helps us pull things apart?
A.
Pulley
B.
Lever
C.
Wedge
D.
Inclined plane
E.
Screw
Correct Answer
C. Wedge
Explanation A wedge is a simple machine that helps us pull things apart. It has a sharp edge that is used to separate or split objects by applying force. When the wedge is driven into a material, it creates a split or separation, allowing us to pull things apart more easily. This makes the wedge an effective tool for tasks such as cutting or splitting wood, or even opening a door.
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6.
Which simple machines help us lift a heavy object?
A.
Wheel and axle, inclined place
B.
Fulcrom
C.
Pulley
D.
Lever
E.
Inclined plane
Correct Answer
A. Wheel and axle, inclined place
Explanation The wheel and axle and inclined plane are both simple machines that can help us lift a heavy object. The wheel and axle allows for easier movement of the object by reducing friction and distributing the weight over a larger surface area. The inclined plane, such as a ramp, allows us to exert less force by spreading the work over a longer distance. These two simple machines work together to make lifting heavy objects more manageable.
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7.
Which simple machine is a stiff bar that moves around a fixed point?
A.
Pulley
B.
Pulley and lever
C.
Screw
D.
Fulcrom
E.
Inclined plane
Correct Answer
D. Fulcrom
Explanation A fulcrum is a stiff bar that moves around a fixed point. It is a simple machine that is used in the lever. When a force is applied to one end of the lever, the fulcrum acts as a pivot point, allowing the lever to move and exert a greater force on the other end. The fulcrum is an essential component of the lever and enables it to provide mechanical advantage by amplifying force or changing the direction of force.
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8.
Which simple machine helps us hold things together?
A.
Fulcrom
B.
Screw
C.
Pulley
D.
Pulley and lever
E.
Lever
Correct Answer
B. Screw
Explanation A screw is a simple machine that helps us hold things together. It consists of a threaded cylinder with a slotted head, allowing it to be easily turned. By twisting the screw into a material, it creates a secure connection and holds the objects together. This makes it an essential tool for construction, woodworking, and various other applications where joining or fastening is required.
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9.
Name one example of a compound machine.
A.
A bike, scissors, car, boat, plus many more.
B.
Puzzles, toys, dolls
C.
Carrots, peas, celery, cats
D.
Hammers, screw drivers, plates, doves
Correct Answer
A. A bike, scissors, car, boat, plus many more.
Explanation Compound machines are made up of two or more simple machines working together to perform a task. Examples of compound machines include a bike, scissors, car, boat, and many more. These machines combine different simple machines such as wheels, levers, gears, and pulleys to accomplish their intended functions.
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10.
What is called when you push or pull something?
A.
Screw
B.
Work
C.
Wedge
D.
Force
E.
Inclined plane
Correct Answer
D. Force
Explanation Force is the correct answer because it is the term used to describe the action of pushing or pulling something. Force is a physical quantity that can cause an object to move, change direction, or stop. When we exert force on an object, it can result in a push or a pull, depending on the direction of the force. So, in the context of the question, force accurately represents the action of pushing or pulling something.
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11.
This is done when using force makes something move.
A.
Pull
B.
Shake
C.
Force
D.
Throw
E.
Work
Correct Answer
E. Work
Explanation The term "work" refers to the application of force to move an object. When force is exerted on an object and it is displaced in the direction of the force, work is said to be done. Therefore, in the given context, "work" is the correct answer as it accurately describes the action of using force to make something move.
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12.
Name the six simple machines.
A.
Nail, hammer, screw, plane, car
B.
Plane, incline, axle, fulcrom, wedge
C.
Work, force, lever, plane
D.
Wedge, screw, pulley, lever, wheel and axle, inclined plane
E.
Everything
Correct Answer
D. Wedge, screw, pulley, lever, wheel and axle, inclined plane
Explanation The correct answer is "Wedge, screw, pulley, lever, wheel and axle, inclined plane." These are the six simple machines. A wedge is a triangular-shaped object used to split or separate materials. A screw is an inclined plane wrapped around a cylinder. A pulley is a wheel with a grooved rim used to change the direction or magnitude of a force. A lever is a rigid bar that pivots on a fulcrum to lift or move objects. A wheel and axle consists of a wheel attached to a smaller axle, allowing for the transfer of force. An inclined plane is a flat surface set at an angle, used to move objects up or down with less force.
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13.
What is it called when two or more simple machines are combined into one machine?
A.
Force
B.
Blenders
C.
Cars
D.
Compound machine
E.
Trucks
Correct Answer
D. Compound machine
Explanation A compound machine refers to the combination of two or more simple machines into one machine. This combination allows for the amplification or modification of force, making it easier to perform tasks that would otherwise require more effort. Compound machines are commonly found in various devices and systems, such as engines, bicycles, and even household appliances like blenders and cars.
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14.
What is a simple machine that is wide at one end and pointed at the other called?
A.
Plane
B.
Force
C.
Whip
D.
Screw
E.
Wedge
Correct Answer
E. Wedge
Explanation A wedge is a simple machine that is wide at one end and pointed at the other. It is used to separate or split objects by applying force to the narrow end. The shape of a wedge allows it to convert a smaller force applied over a larger distance into a larger force over a shorter distance. This makes it an effective tool for tasks such as cutting, splitting, or holding objects in place.
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15.
What do we use simple machines for?
A.
Move faster
B.
Jump higher
C.
To make work easier
D.
Let go to sleep easier
E.
Run faster
Correct Answer
C. To make work easier
Explanation Simple machines are tools that help us perform work with less effort. They allow us to apply a smaller force over a greater distance, which reduces the amount of work needed to be done. By using simple machines, we can accomplish tasks more easily and efficiently. Therefore, the correct answer is "to make work easier".
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16.
Which simple machine has a rod attached to a wheel?
A.
Gas
B.
A wheel and axle
C.
Lights
D.
Hammer
E.
Nails
Correct Answer
B. A wheel and axle
Explanation A wheel and axle is a simple machine that consists of a rod (axle) attached to a wheel. This combination allows for the efficient transfer of force and motion. As the wheel rotates, it can either increase force (by applying force to the wheel and generating a larger force on the axle) or increase speed (by applying force to the axle and generating a larger speed on the wheel). This simple machine is commonly used in various devices such as cars, bicycles, and pulley systems.
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