Forces, Motion, & Simple Machines Review

Max must help his brother move their new stove into the house. He must help unload stove from the truck, put it on a moving cart, prop open the front door of the house and unload the stove in the kitchen. Choose the list of all the simple machines and the reason Max will use each one to get the stove into the kitchen.

• Max will need to use a pulley to unload the stove from the truck, an inclined plane for the moving cart, and a wedge to prop open the front door.

• Max will need to use an inclined plane to unload the stove from the truck, a wheel and axle for the moving cart, and a wedge to prop open the front door.

• Max will need to use a wheel and axle to unload the stove from the truck, a wedge for the moving cart, and a screw to prop open the front door.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Josephine is trying to lift the box off the ground. Josephine placed the fulcrum between Point B and Point C and could not lift the box.

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

• Josephine will need to place the fulcrum at point C, because it is between the fulcrum and the load, which will minimize the force needed to lift the box.

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

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

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

David and his friend Delia arrive at the playground. David and his friend are so much alike. They are the same age, the same height, and they even weigh the same. They can't wait to play on the new seesaw at the playground. David hops onto one side and Delia hops onto the other.

What will happen most likely happen to David and Delia on the seesaw?

• David and Delia will not move because their forces are balanced.

• David and Delia will not move because their forces are unbalanced.

• David will move up, and Delia will move down because their forces are unbalanced.

• David will move down, and Delia will move up because their forces are unbalanced.

Tags

NGSS.3-PS2-1

A student claims that whenever they kick a soccer ball in the air, the force of gravity impacts the soccer ball. Which piece of evidence would support the student’s claim?

• The soccer ball slows down and then falls towards the ground with speed.

• The soccer ball moves at a quick speed the moment the student kicks the soccer ball.

• The soccer ball is caught by the goalie.

Tags

NGSS.MS-PS2-4

Marissa grows two marigold plants in two hanging pots. She plants one marigold upright and she plants the other upside down, as seen in the picture above. Both marigolds’ roots grow downward.  

Why do the roots of both plants grow downward?

• The roots grow downward because the plants are up in the air and the roots are trying to get to the ground.

• The roots grow downward because they are trying to get to reach the air below the pots.

• The roots grow downward because they are affected by the force of gravity.

Tags

NGSS.MS-PS2-4

Which picture shows an unbalanced force?

• Picture D, because the girl kicking the soccer ball shows an unbalanced force.

• Picture C, because the pictures hanging are an unbalanced force on the wall.

• Picture B, because the cat sleeping is an unbalanced force on the couch.

• Picture A, because the books are an unbalanced force on the table.

Tags

NGSS.MS-PS2-2

It is easier to push a box up a ramp than to lift it directly from the floor. This solution is an example of what kind of simple machine making something easier?

• Inclined Plane

• Pulley

• Wheel and Axle

• Fulcrum

Forces on an object that do not change the motion of an object.

• balanced force

• force

• unbalanced force

Tags

NGSS.3-PS2-1

A teacher is moving classrooms across the school but on the same floor and wants to make the move as easy as possible. The teacher does not need to move anything upstairs.

Which of the following questions should the teacher ask to determine the BEST simple machine to use for the move?

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

• Should the teacher use an inclined plane to push all of 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-ETS1-2

NGSS.MS-PS2-1

A ball rolls across a table. The ball reaches the edge of the table and falls to the ground. A group of students argues why the ball fell.

Which student’s argument is BEST based on the scenario?

• Student 1 says the force of gravity caused the ball to fall to the ground because gravity usually moves objects downward on Earth.

• Student 2 says an unbalanced push causes the ball to fall to the ground because pushes are the only type of unbalanced force.

• Student 3 says the force of the wind causes the ball to fall to the ground because wind can move objects on Earth.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4