Filo tightly squeezed a dishwashing foam causing it to shrink. Which of the following best describes the effect of force on a material?

• Force affects the size of material.

• Force cannot affect the size of material

• Materials that have mass are not affected by force.

• Force is invisible so the effect of it cannot be seen in the material.

What are the effects of force to the objects?

• change in shape

• remain in place

• slow down

• all of the above

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

These are forces that are NOT opposite in direction and equal in size.

• balanced

• contact

• non- contact

• unbalanced

The following are the examples of forces applied in our everyday lives EXCEPT:

• the capacity for doing work

• the force of a bat on the ball

• the force of the hairbrush on hair when it is being brushed

• the force of your foot pushing on the pedal when you ride your bike

These forces are equal in size and opposite in direction.

• balanced

• contact

• non- contact

• unbalanced

When the sum of the forces equals zero, the forces are said to be in ________.

• combination

• equilibrium

• friction

• tension

Is balanced force considered to be in a state of equilibrium?

• Not sure, it depends on the amount of combined force.

• Definitely not, because a balanced force keeps an object moving.

• No, because balanced forces cannot change the motion or direction of an object.

• Yes, combined forces that are balanced are always equal to zero which means the force is in equilibrium state.

What force must be acted upon an object in order for it to produce motion?

• balanced

• friction

• non- contact

• unbalanced

Tags

NGSS.HS-PS2-1

Why is it that when we are standing, we are not moving?

• The Earth is pressing on us with the greater force.

• The humankind exerts greater force than Earth is exerted.

• The Earth is pressing on us with the same force that we are exerting on it.

• The Earth has a strong magnetic field and humankind wears certain metals attracted to it.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

When a football is kicked, its shape changes for a fraction of a second. This is because:

• Force changes the shape of an object.

• Motion changes the shape of an object.

• Momentum changes the shape of an object.

• Force does not change the shape of an object.