#1 T3 Simple Machines

The fixed point around which a lever rotates is know as the

• wheel.

• fulcrum.

• input force.

• output force.

Which of the following is NOT an example of the simple machine know as a screw?

• lid of a jar

• turning on and off a faucet

• a drill bit

• a screw driver

How can simple machines make work easier?

• by decreasing the force needed to complete the task

• by increasing the friction between the machine and the object

• by adding more work on the object than originally applied

• by removing the force of gravity on the object

Tags

NGSS.MS-ETS1-1

Which simple machine would be the MOST efficient for lifting an object 30 meters off the ground?

• pulley

• screw

• wedge

• lever

Tags

NGSS.MS-PS2-1

Workers push a heavy box up an inclined plane and onto a moving truck. Which best explains why these workers use an inclined plane?

• It makes their work easier because it requires less effort.

• It decreases the amount of work they have to do.

• It increases the amount of friction necessary to do the task.

• It makes the box weigh less.

Tags

NGSS.MS-ETS1-1

Simple machines can make work easier by reducing the input force needed to move an object. However, there is a trade off for decreased input. What is the trade off?

• The distance the object is moved is increased.

• The distance the object is moved is decreased.

• The amount of work is increased.

• The amount of work is decreased.

Tags

NGSS.MS-ETS1-1

The lever class in the picture is _?_.

• 1
• 2
• 3

What simple machine is in this image

• Wedge

• Lever

• screw

• wheel and axel

• Incline plane

Which is an example of someone using a simple machine to do work?

• a boy runs across a football field
• a banker counts money
• a mother pushes a stroller up a ramp into a building

• a girl eats a sandwich

What simple machines are in a bike? Check all that apply?

• Inclined Plane

• Pulley

• Wheel and Axle

• Wedge

• Lever