Inclined Plane and Work

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

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Tags

NGSS.MS-PS2-2

A student is helping his neighbor move a new dishwasher into their house. The house has three steps on the front porch that cause the porch to be 2 meters above the ground. Which method requires the least amount of force to get the dishwasher from the ground to the porch?

• Lift the dishwasher up one step at a time with a partner, and rest one minute between steps.

• Place an inclined plane that is 10 meters long over the stairs, and roll the dishwasher up the inclined plane with a partner.

• Place an inclined plane that is 5 meters long over the stairs, and roll the dishwasher up the inclined plane with a partner.

• Use a fixed pulley attached to the roof of the porch to lift the dishwasher with a partner.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

• A

• B

• C

• They all require the same amount of force.

Tags

NGSS.MS-PS2-2

Students want to raise a large crate from the ground to a deck several feet above the ground. They know it will be easier to move the crate along an inclined plane because the inclined plane will —

• A. reduce the work needed to raise the crate.

• B. increase the force applied to the crate.

• C. increase the work done on the crate.

• D. reduce the force necessary to raise the crate.

Tags

NGSS.MS-PS2-2

All of the following are examples of inclined planes except —

• A. a ramp

• B. a screw

• C. a slide

• D. a seesaw

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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Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

Which simple machine increases the distance over which a load travels and reduces the needed force?

• wheel and axle

• wedge

• pulley

• inclined plane

Tags

NGSS.MS-PS2-2

A worker needs to load a heavy box onto a truck. The worker uses a ramp to move the box because the ramp...

• increases the weight of the box.

• reduces the gravitational force on the box.

• increases the amount of friction on the box.

• reduces the amount of force applied to the box.

Tags

NGSS.MS-PS2-4

The diagram shows two ramps that a person could use to raise a 10-kilogram cardboard box to a height of 1 meter. Which statement correctly describes the force required to raise the box using the ramps?

• A. The same amount of force will be required when using either ramp because both boxes have a mass of 10 kg.

• B. The same amount of force will be required when using either ramp because both ramps are 1 meter high.

• C. More force will be required to raise the box using Ramp X because Ramp X is steeper than Ramp Y.

• D. More force will be required to raise the box using Ramp Y because Ramp Y is longer than Ramp X.

Tags

NGSS.MS-PS2-2