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WorksheetsMFE 4.3 Study Guide
Total questions: 29
Worksheet time: 29mins
What are the six basic kinds of simple machines?
The inclined plane, the screw, the lever, the wheel & axle, and the pulley
The inclined plane, the wedge, the screw, the lever, the wheel & axle, the pulley, and the nail
The inclined plane, the wedge, the screw, the lever, the wheel & axle, and the pulley
The inclined planes, the wedge, the screw, the lever, and the wheel & axle
What is an inclined plane?
A steep, curved surface
A flat, sloped, curved surface
A flat surface
A flat, sloped surface
What formula do you use to determine the mechanical advantage of an inclined plane?
Mechanical Advantage = length of incline/height of incline
Mechanical Advantage = height of incline/length of incline
The longer the incline, the less _______________ you need to push or pull an object on an inclined plane.
input force
output force
distance
length
Indicate the responses that are true about inclined planes.
The necessary input force is less than the output force.
A ramp is an example of an inclined plane.
The necessary input force is more than the output force.
An inclined plane allows you to exert your force over a longer distance.
What is a wedge?
A device that is thin at one side and tapers to a thick edge on the other side
A device that is thick at one side and tapers to a thin edge on the other side
True or False: In a wedge, the inclined plane itself moves.
True
False
True or False: The longer and thinner a wedge is the greater its mechanical advantage
True
False
What is a screw?
An inclined plane wrapped around a cylinder
An inclined plane wrapped around a cube
An deinclined plane wrapped around a cylinder
An inclined cylinder wrapped around a plane
A spiral inclined plane forms the __________ of a screw.
top
base
threads
shape
Indicate all that are true. When twisting a screw into a piece of wood, where is the input force applied and where is the output force exerted?
Your input force is applied on the screw and the output force is exerted on the wood
Head of screw = input
What is a lever?
A rigid point that is free to pivot, or rotate, in a fixed point
A rigid fulcrum that is free to pivot, or rotate, in a fixed point
A rigid area that is free to pivot, or rotate, in a fixed point
A rigid bar that is free to pivot, or rotate, in a fixed point
The fixed point that a lever pivots around is called the _________.
lever
fixed point
fulcrum
Indicate each sentence that is true about levers.
A lever increases the effect of your input force. \
There are three different types of levers.
A lever changes the direction of your input force.
The fulcrum is always located at the same place on a lever.
What class of levers are doors, wheelbarrows, bottle openers?
1st
2nd
3rd
What class of levers are seesaws, scissors, pliers
1st
2nd
3rd
What class of levers are baseball bats, shovels, fishing poles
1st
2nd
3rd
What formula do you use to calculate the ideal mechanical advantage of a lever?
MA = distance from the fulcrum to the output divided by the distance from the fulcrum to the input
MA = distance from the fulcrum to the input divided by the distance from the fulcrum to the output
What is a wheel and axle?
A simple machine made of two pyramidal or cylindrical objects fastened together that rotate about a common axis
A compound machine made of two circular or cylindrical objects fastened together that rotate about a common axis
A simple machine made of two circular or cylindrical objects unfastened that rotate about a common axis
A simple machine made of two circular or cylindrical objects fastened together that rotate about a common axis
What formula do you use to calculate the ideal mechanical advantage of a wheel and axle?
MA = Radius of wheel/Radius of axle
MA = Radius of axle/Radius of wheel
What is a pulley?
A compound machine made of a grooved wheel with a rope or cable wrapped around it
A simple machine made of a grooved wheel with a rope or cable wrapped around it
A simple machine made of a ungrooved wheel with a rope or cable wrapped around it
A simple wheel made of a grooved machine with a rope or cable wrapped around it
What kind of pulley changes the direction of the input force but does not change the amount of force you apply?
Fixed Pulley
Moveable Pulley
Block and Tackle Pulley
What kind of pulley has an ideal mechanical advantage of 2?
Fixed Pulley
Moveable Pulley
Block and Tackle Pulley
What do most of the levers in your body consist of?
Bones and Muscles
Bones and Tendons
Tendons and Muscles
Muscles and Nerves
Your muscles are attached to your bones by tough connective tissue called _____________.
ten-joints
nerves
joints
tendons
In a living lever in your body, what acts as the lever’s fulcrum?
The tendons
The joints
The muscles
The bones
What simple machines do your incisors resemble?
Wedges
Pulleys
Wheel and Axles
Screws
What is a compound machine?
Four or more simple machines put together
Three or more simple machines put together
Two or more simple machines put together
Two simple machines put together
What do you need to know to calculate the mechanical advantage of a compound machine?
The mechanical advantage of all of the individual simple machines and then you add them
The mechanical advantage of all of the individual simple machines and then you multiply them
The mechanical advantage of all of the individual simple machines and then you divide them
The mechanical advantage of all of the individual simple machines and then you subtract them
