Inclined Planes

The diagram shows a wooden block being pulled up an inclined plane that is 30 cm in height. Using the inclined plane reduces the amount of force needed to life the block while increasing the-

• mass of the wooden block.

• surface area of the block.

• pull of gravity on the block.

• distance the block must move.

The advantage of using an inclined plane is to reduce the -

• force needed to lift heavy objects.

• time needed to load many objects.

• work being done while moving objects.

• amount of friction that affects objects.

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.

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

• The distance the object moves.

• The pull of gravity on the object.

• The force needed to move the object.

• The amount of space the object occupies.

The illustraction shows a wooden block being pulled up an inclined plane with a spring scale. What change in the experimental setup would require more force to pull the block up the inclined plane?

• Using a much longer inclined plane.

• Pulling the wooden block more quickly.

• Reducing the mass of the wooden block.

• Increasing the height of the inclined plane.

When an object is lifted directly from the ground rather than moved with an inclined plane, which of the following will be increased?

• The mass of the object.

• The work done on the object.

• The force needed to move the object.

• The amount of friction acting on the object.

Tags

NGSS.MS-PS2-4

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 mass of the object.

• 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.

Which of the following will require the least force to move the load up the inclined plane?

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Tags

NGSS.MS-PS2-2