Simple Machines

What question could a friend ask to determine this claim is correct?

• Will a seesaw lift up a student by rotating with a wheel rotating around a rod?

• Does a seesaw lift and lower a student through a rope and wheel system?

• How does a wedge on a seesaw stay in place to lift up a student?

• Is a seesaw supported by a fulcrum to lift up a student?

Tags

NGSS.3-PS2-1

Pick 2 simple machines that change the direction of the force.

• lever

• pulley

• inclined plane

• wheel and axle

• wedge

Tags

NGSS.MS-PS2-1

You have a box that has your new TV in it and you need to get it into your house from the truck. Which question which BEST be asked to determine which ramp to use?

• What is the distance from the truck to the house?

• Which of the following ramps will allow you to create the most friction?

• Which of the following ramps will require less force to move the box?

• How much does the box weigh?

From the list above, which question should Max ask to figure out that he should use the wheel and axle to move the stove from the truck?

• Will I need to elevate the stove from the sidewalk into the front door?

• Will I need to elevate the stove to bring it inside the house?

• Will I need to constantly keep the door open without shutting?

• Will I need to roll the stove from the truck to the front door?

Tags

NGSS.3-5-ETS1-1

NGSS.3-5-ETS1-2

Which of the following best describes the screw as a simple machine?

• an inclined plane wrapped around an axle/rod/cylinder

• a wheel wrapped around an inclined plane

• a pulley wrapped around a lever

• a lever wrapped around a wedge

How do simple machines affect work?

• They increase the amount of force needed for work.

• They do all the work and remove the need for force.

• They change the direction or the amount of force needed for work.

• They make the work harder to do by increasing the need for force.

Josephine needs to know where to position the fulcrum to lift the box easily. What question should she ask to figure out where to place the fulcrum to minimize the amount of force she will need to use?

• Should Josephine place the fulcrum at point A since it is furthest from the load and closest to the force applied, which will minimize the force needed to lift the box?

• Should Josephine place the fulcrum at point D since it is closest to the load and furthest from the force applied, which will minimize the force needed to lift the box?

• Should Josephine place the fulcrum at point B since it is further from the load and closer to the fulcrum, which will minimize the force needed to lift the box?

• Should Josephine place the fulcrum at point C since it is between the fulcrum and the load, which will minimize the force needed to lift the box?

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What question should the student ask the parents to help them figure out how to solve this problem?

• Can we use a lever to place the furniture on one side and the family can stand on the other?

• Can we create a pulley system to attach the furniture and pull it up to the loft?

• Should we create a wheel and axle to roll the furniture up the staircase?

• Should we create an inclined ramp so we can push all of the furniture to the loft upstairs?

Tags

NGSS.MS-ETS1-2

NGSS.MS-ETS1-1

A teacher is moving classrooms across the school and wants to make the move as easy as possible. Which of the following questions should the teacher ask to determine the best simple machine to use for the move?

• Should the teacher use an inclined plane to push all of the classroom objects from one place to another?

• Should the teacher use a pulley to pull all of the classroom objects from one place to another?

• Should the teacher use a lever to lift and move the classroom objects from one place to another?

• Should the teacher use a wheel and axle to move the classroom objects from one place to another?

Tags

NGSS.MS-PS2-1

NGSS.MS-ETS1-2

How does a single pulley make work seem easier?

• It increases the speed of force.

• It changes the direction of force.

• It decreases the amount of work needed.

• It changes the amount of force needed.