The more supporting strings a pulley system has, the less efficient it is because ___________________.

you are changing the direction of the force

Third class levers always require more force to lift something. Why should we use them?

They increase the distance over which the force acts.

They change the direction of the force.

They make it easier to lift something.

You use a lever to try and lift a rock, but you are unable to lift it. What are two ways you can adjust the lever to increase your IMA?

Move the input force away from the fulcrum

Move the output force closer to the fulcrum

Move the input force closer to the fulcrum.

Move the output force away from the fulcrum

What is the disadvantage of using an inclined plane to life a heavy object?

The object must be moved a greater distance.

It takes less effort to move the object.

Many objects are difficult to lift straight up.

Heavy objects usually take up more space.

The diagram shows an investigation in a science classroom. Students pull the same mass up an inclined plane propped up on five blocks, then six, seven, and eight blocks. Each time they use a spring scale to measure the force needed to pull the mass up the inclined plane. This investigation can show how which of the following affects the force needed to move an object up an inclined plane?

The height of the inclined plane.

The length of the inclined plane.

The surface area of the object.

How could students find out whether a short ramp or a long ramp would require less force to use? Measure the amount of force it takes to move -

an object up two ramps with the same height but different lengths.

an object up two ramps with equal heights and equal lengths.

an object up two ramps with the same length but different heights.

one object up a ramp and a larger object up an identical ramp.

Students pulled the same mass up an inclined plane that was 20 cm, 30 cm, and 40 cm long. Each time, they used a spring scale to measure the force needed to pull the mass up the inclined plane. What did they conclude?

The least amount of force was needed on the 40 cm inclined plane.

Less force was needed on the 20 cm plane

More force was needed on the 40 cm inclined plane.

The least amount of force was needed on the 30 cm inclined plane.

Levers, Pulleys, and Inclined Planes

Quiz

•

Physics

•

9th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-PS2-2, MS-PS2-4, MS-PS2-1

+4

Standards-aligned

Chad Conzemius

Used 419+ times

FREE Resource

30 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do fixed pulleys make work easier?

they change the direction of a force

they change the amount of force required

the distance over which the force is applied

the measurement of an object

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Identify the type of pulley

fixed

moveable

block and tackle or pulley system

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Identify the type of pulley

Fixed

Moveable

Block and Tackle or pulley system

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The diagram shows a movable pulley system. When moving a load, the movable pully changes the —

direction of the force.

amount of force needed.

pull of gravity on the load.

overall mass of the rope.

What is the ideal mechanical advantage (IMA) of this pulley?

.5

1

1.5

2

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A load of 650 newtons is lifted with this pulley. If there was no friction, how much force should be needed to lift the weight?

300

325

600

650

An input force of 450 newtons is applied to this pulley. If there was no friction, how much weight should it be able to lift?

450

600

750

900

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Levers, Pulleys, and Inclined Planes

30 questions

How do fixed pulleys make work easier?

Identify the type of pulley

Identify the type of pulley

The diagram shows a movable pulley system. When moving a load, the movable pully changes the —

What is the ideal mechanical advantage (IMA) of this pulley?

A load of 650 newtons is lifted with this pulley. If there was no friction, how much force should be needed to lift the weight?

An input force of 450 newtons is applied to this pulley. If there was no friction, how much weight should it be able to lift?

What is the ideal mechanical advantage of this pulley?

If there is no friction, how much force would be required to lift an output force of 170 newtons using this pulley system?

What is the ideal mechanical advantage of this pulley system?

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