Mass, Force, and Motion

Students described the amount of force needed to change the motion for each ball from idle to rolling.  Which statement is true?*

• The beach ball has less mass, but it took more force to make it roll.
• The bowling ball has less mass, but it took more force to make it roll.
• The beach ball has more mass, therefore it took less force to make it roll.
• The bowling ball has more mass, therefore, it took more force to make it roll.

Tags

NGSS.MS-PS2-2

A boy got a new balloon launcher. He experimented with different size balloons. What is the best hypothesis for this experiment?

• If the friction of the balloon decreases, then the mass needed by the launcher will need to increase
• If the force of the balloon decreases, then the mass needed by the launcher to move the balloon will also decrease. 
• If the mass of the balloon increases, then the force needed by the launcher to move the balloon will also need to increase.
• If the size of the balloon increases, then the speed needed by the launcher to move the balloon will need to decrease.

Tags

NGSS.MS-PS2-2

Which of the following statements is true if both boxes are full?

• The boxes each require a different amount of force in order to move.
• The box of light bulbs requires more force to move than the box of books.
• The two boxes are the same size and shape so the same amount of force is required to move each box.
• It takes less force to move the box of books than the box of light bulbs.

Tags

NGSS.MS-PS2-2

This is the force of attraction, or pull, between any two objects. 

• friction
• gravity
• force
• unbalanced force

Tags

NGSS.MS-PS2-4

Which scenario would require the greatest amount of force if all boxes are the same size?

• Pushing a box full of books up a ramp.
• Pushing an empty box down a ramp.
• Pushing a box full of books down a ramp.
• Pushing an empty box up a ramp.

Tags

NGSS.MS-PS2-2

A push or a pull on an object is an example of

• weight
• work
• force
• energy

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

If an equal force was exerted on boxes of various weights, which box would move the farthest?

• A 10lb box
• A 30lb box
• A 20lb box
• A 50lb box

Tags

NGSS.MS-PS2-2

• Start the car just passed halfway mark on the ramp.
• Start the car at the bottom of the ramp.
• Start the car at the top of the ramp.
• Start the car just before the halfway mark on the ramp.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-2

• The box will slowly turn in place.
• The boxy will moved toward student 1.
• The box will move toward student 2.
• The box will not move.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Friction usually _________ with the roughness of a surface.

• increases
• decreases