Inclined Planes

The inclined plane makes work easier by _____ the amount of effort that must be applied to raise or lower a load.

• increasing
• accelerating
• reducing
• softening

To reduce the amount of effort needed to raise or lower an object in an inclined plane, the length of the slope should be ______.

• Distance
• Extended

A push or pull = Force

• True
• False

What is a disadvantage of using an inclined plane to lift 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 object usually take up more space.

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

• increasing the distance the object moves.
• transferring more of the force to the object
• reversing the direction the object is moved.

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?

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

Which inclined plane requires the most force to push the ball to the top?

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• 

Which of the following inclined planes would require the least amount of force to lift a box?

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• 
• 
• They all require the same amount of force.

Robert is using an inclined plane to move a heavy box into a truck bed that is two meters off the ground. Which of the inclined planes should Robert use to get the greatest mechanical advantage?

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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.