Force Motion and Energy

A simple machine makes work easier because using it —

• changes the weight of something heavy

• lets something become a different shape

• takes less force to move something heavy

• improves the way something looks

A group of children work together to make a birdhouse. What simple machine will hold the pieces of wood together?

• Screw

• Pulley

• Lever

• Inclined plane

The diagram shows two activities with gravity at work. 

Based on the activities, which two (2) statements about gravity are true?

• Gravity pushes objects away from Earth.

• Gravity pulls objects to Earth.

• Gravity causes objects to float in the air.

• Gravity causes objects to fall to the ground.

Tags

NGSS.5-PS2-1

What simple machine is raised so one end is higher than the other?

• screw

• wedge

• lever

• inclined plane

For homework, the teacher asked Stephanie to draw examples of a lever. Which three items can she draw in her notebook?

• skateboard

• ramp

• shovel

• broom

• seesaw

Tags

NGSS.3-5-ETS1-1

Which picture is an example of a compound machine?

• 
• 
• 
• 

Each of these simple machines contains a —

• wheel and axle

• pulley

• wedge

• lever

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A pulley can be used to —

• lift heavy objects

• move or turn things

• cut or split objects

• hold objects together

Which example best shows friction?

• The walking club slows down at the end of their walk to stretch.

• For the first few seconds, the parachuter gains speed after jumping out of a plane.

• The brakes on the car heated up as they were pushed and the car slowed down.

• A snow drift starts to fall down a mountain picking up more snow along the way.

• Toddlers pedal fast in a tricycle race to see who will be the winner.

Tags

NGSS.3-PS2-1

If the force of the students pulling the rope is an unbalanced force, which three of the following are true?

• The direction of one side of the students' pulling may change.

• The speed of the students' pulling the rope may change.

• The students are pulling with equal force and the rope will remain still.

• The speed and direction of the students on either side of the rope may change.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2