Forces and Machines

What is a force?

• a push or pull
• speed or acceleration 
• potential or kinetic energy
• balanced or unbalanced force

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

When objects remain in the same place, it is called...

• gravity
• friction
• balanced force
• unbalanced force

When an object has potential energy, it is not moving.

• true
• false

Tags

NGSS.MS-PS3-2

What is the force that causes everything to be pulled down to the Earth?

• friction
• gravity
• balanced
• unbalanced

Tags

NGSS.5-PS2-1

Kinetic energy is when....

• energy is stored up in an object
• energy is released and the object moves

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Force is measured in....

• Galileos 
• Newtons
• Di Vincis
• Einsteins 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

An unbalanced force is when objects move in one direction because the force is greater from that direction.

• true
• false

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Some students wanted to find out if a tennis ball and a baseball dropped from the same height hit the ground at the same time. This investigation tests the effect of which of the following?

• wind

• friction

• gravity

• magnetism

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Students conducted an investigation in which they rolled a soda can down a ramp that was 30 cm high and one that was 40 cm high. Which question were the students most likely trying to answer?

• How does mass of a soda can affect the distance it will roll?

• How does surface friction affect the distance a soda can will roll?

• How does the size of a soda can affect the distance it rolls?

• How does ramp height affect the distance a soda can rolls?

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Students conducted an investigation in which they measured the distance a toy car traveled after rolling down a ramp covered with sandpaper or wax paper. Which of these questions can the students answer by analyzing the results of their investigation?

• How does changing the height of a ramp affect the distance a toy car rolls?

• How does changing the surface of a ramp affect the distance a toy car rolls?

• How does mass affect the distance a toy car moves after rolling down a ram?

• How does the design of a toy car affect its movement after rolling down a ramp?

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1