Mechanical Advantage Part1

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

• a. The object must be moved a greater distance.

• b. It takes less effort to move the object.

• c. Many objects are difficult to lift straight up.

• d. Heavy object usually take up more space

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?

• a. Less force was needed on the 20 cm plane

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

• c. More force was needed on the 40 cm inclined plane.

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

An inclined plane reduces the amount of force needed to move an object by - 

• a. increasing the distance the object moves.

• b. transferring more of the force to the object

• c. reversing the direction the object is moved.

• d. decreasing the distance the object moves.

Which of the following decreases when an object is moved using an inclined plane?

• a. The distance the object moves.

• b. The pull of gravity on the object.

• c. The force needed to move the object.

• The amount of space the object occupies.

What does an inclined plane look like from the side?

• a. square

• b. triangle

• c. triangle

• d. circle

 How does using an inclined plane make lifting a load easier?

• a. it makes the mass levitate upward

• b. it increases the force needed to

• c. it decreases the force needed to lift a mass

• d. lift a mass

  it doesn't help.

 

How does distance change the effort when using an inclined plane?

• a. as distance increases, effort decreases

• b. as distance decreases, effort decreases

• as distance increases, effort increases

• nothing, they both stay the same

Why is an inclined plane an example of a simple machine?

• a. because it is a machine

• b. because it makes work harder

• c. because it makes the work easier

• d. because it sounds coo

All of the following are examples of inclined planes EXCEPT - - -

• a. an escalator

• b. an uphill trail

• c. a slide

• d. a table

Movers needed to move a heavy box from the bottom of some stairs to the top of the stairs. They placed a ramp over the stairs and pushed the box up the ramp.

Which best explains why the movers used a ramp to move the box?

• a. The ramp reduced the amount of

  force needed to move the box.

• b. The ramp reduced the distance that

  the box needed to be moved.

• c. The ramp increased the height that

  the box needed to be moved.

• d. The ramp increased the amount of friction needed to move the box.