Asked by wasssupppp


Force and Work Unit Test
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Question
Use the diagram of the pulley system to complete the statement.

An illustration shows a system of two pulleys lifting a block.

In this pulley system, the pulleys will _____ the mechanical force required to lift the block and will change the _____.

(1 point)
Responses

increase; direction of the force
increase; direction of the force

decrease; direction of the force
decrease; direction of the force

decrease; weight of the block
decrease; weight of the block

increase; weight of the block
increase; weight of the block
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Answered by GPT 3.5
increase; direction of the force
Answered by wasssupppp

Force and Work Unit Test
3 of 123 of 12 Items



Question
Which list correctly orders effort (E), fulcrum (F), and load (L) for each lever class?(1 point)
Responses

class 1 = F, E, L (or L, E, F)
class 2 = L, F, E (or E, F, L)
class 3 = F, L, E (or E, L, F)
class 1 = F, E, L (or L, E, F) class 2 = L, F, E (or E, F, L) class 3 = F, L, E (or E, L, F)

class 1 = L, F, E (or E, F, L)
class 2 = F, L, E (or E, L, F)
class 3 = F, E, L (or L, E, F)
class 1 = L, F, E (or E, F, L) class 2 = F, L, E (or E, L, F) class 3 = F, E, L (or L, E, F)

class 1 = F, L, E (or E, L, F)
class 2 = F, E, L (or L, E, F)
class 3 = L, F, E (or E, F, L)
class 1 = F, L, E (or E, L, F) class 2 = F, E, L (or L, E, F) class 3 = L, F, E (or E, F, L)

class 1 = F, E, L (or L, E, F)
class 2 = F, L, E (or E, L, F)
class 3 = L, F, E (or E, F, L)
class 1 = F, E, L (or L, E, F) class 2 = F, L, E (or E, L, F) class 3 = L, F, E (or E, F, L)
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Answered by GPT 3.5
class 1 = F, E, L (or L, E, F)
class 2 = L, F, E (or E, F, L)
class 3 = F, L, E (or E, L, F)
Answered by wasssupppp

Force and Work Unit Test
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Question
How do simple machines make work easier?(1 point)
Responses

They decrease the distance needed between a person and an object, allowing the person to apply more force and do more work.
They decrease the distance needed between a person and an object, allowing the person to apply more force and do more work.

They increase the distance over which a force is needed, doing more work with less force.
They increase the distance over which a force is needed, doing more work with less force.

They magnify the force being applied, thereby decreasing the work they can do with no extra energy exerted by the person using the machine.
They magnify the force being applied, thereby decreasing the work they can do with no extra energy exerted by the person using the machine.

They reduce the amount of force needed to move an object to do the same amount of work.
They reduce the amount of force needed to move an object to do the same amount of work.
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Answered by GPT 3.5
They reduce the amount of force needed to move an object to do the same amount of work.
Answered by wasssupppp
A person using a lever applies 98 Newtons to lift a 20-kilogram box. They apply the force over a distance of 4 meters to lift the box a distance of 2 meters. How much work is done?(1 point)
Responses

392 Joules
392 Joules

80 Joules
80 Joules

196 Joules
196 Joules

40 Joule
Answered by GPT 3.5
The work done can be calculated using the formula:

Work = Force x distance

Given:
Force = 98 Newton
Distance = 4 meters

Work = 98 Newton x 4 meters = 392 Joules

Therefore, the correct answer is:
392 Joules
Answered by wasssupppp
A person is lifting a heavy box using a lever. What is the purpose of the lever in this situation?(1 point)
Responses

to reduce the force needed to lift the box and change the direction of the force
to reduce the force needed to lift the box and change the direction of the force

to reduce the energy needed to lift the box and change the direction of the force
to reduce the energy needed to lift the box and change the direction of the force

to reduce the force needed to lift the box while keeping the direction of the force the same
to reduce the force needed to lift the box while keeping the direction of the force the same

to reduce the energy needed to lift the box while keeping the direction of the force the same
Answered by GPT 3.5
to reduce the force needed to lift the box while keeping the direction of the force the same
Answered by wasssupppp

Force and Work Unit Test
7 of 127 of 12 Items











Question
Use the image of a person lifting a boulder with a lever to answer the question.

An illustration shows a man using a stick and a small rock as a lever to lift a large rock.

Where is the fulcrum in this situation?

(1 point)
Responses

It is the point where the boulder touches the ground.
It is the point where the boulder touches the ground.

It is the point where the person’s hands push down on the bar.
It is the point where the person’s hands push down on the bar.

It is the point where the bar touches the smaller rock.
It is the point where the bar touches the smaller rock.

It is the point where the bar touches the boulder.
It is the point where the bar touches the boulder.
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Answered by GPT 3.5
It is the point where the bar touches the smaller rock.