mi-star 6.4

Six students are playing tug-of-war. A ribbon is tied tightly on the rope to mark the middle. The ribbon is staying in the middle and not moving. How do the forces applied to the rope affect the motion of the rope and ribbon.

• The ribbon will move to the right.

• The ribbon will move to the left.

• The ribbon will not move in either direction.

• There is not enough information to tell.

Tags

NGSS.MS-PS2-2

Seven students are playing tug-of-war, three students on one side and four students on the other side. A ribbon is tied tightly on the rope in the middle. How will the forces applied effect the motion of the rope and ribbon?

• The ribbon will move toward the side with three students.

• The ribbon will move toward the side with four students.

• The ribbon will not move either direction.

• There is not enough information to predict how the ribbon will move.

Tags

NGSS.MS-PS2-2

In a game of tug-of-war, how are the forces on the rope balanced?

• When the force applied to one side is greater than the force applied to the other.

• When the forces applied on both sides are equal.

• When the forces are all in the same direction.

• There is not enough information to tell.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

You have two different size boxes, made of the same material, placed on a smooth, flat, slippery surface. The blocks are not moving when placed on the surface, but move easily when force is applied. Which block will have a greater change in motion when force is applied?

• The block with more mass.

• They will both have the same change in motion.

• The block with less mass.

• There is not enough information to tell.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

You have two different size boxes, made of the same material, placed on a smooth, flat, slippery surface. The boxes are not moving when placed on the surface, but move easily when force is applied. If more force is applied to the larger box. How would this affect the change in motion of the boxes?

• The change in motion will increase.

• The change in motion will decrease.

• The change in motion will be the same.

• There is not enough information to tell.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

If a model of a sailboat on water shows the force of the wind and the force of the water as being equal and in opposite directions. We can conclude:

• The sailboat will speed up for a short time and then move at a constant speed.

• The sailboat will slow down and then stop.

• The sailboat will move at constant speed the entire time.

• The sailboat will speed up the entire time.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

If a model of a sailboat shows that the force of the wind acting on it is greater than the force of the water and these forces are in opposite directions. We can conclude that:

• The sailboat will speed up for a short time and then move at a constant speed.

• The sailboat will slow down and then stop.

• The sailboat will move at a constant speed the entire time.

• The sailboat will speed up the entire time.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Forces acting on an object are unbalanced when:

• They are equal and in the opposite direction.

• They are not thinking right.

• They agree with me.

• They are unequal or in the same direction.

Tags

NGSS.MS-PS2-2

Forces acting on an object are balanced when:

• They are unequal in magnitude and similar in direction.

• They agree with me.

• They are equal in magnitude and opposite in direction.

• They are normal.

Tags

NGSS.HS-PS2-1

What is an independent variable.

• The thing that is changed in an investigation.

• The thing that remains the same in an investigation.

• The thing that is measured in an investigation.

• There is not enough information to tell.