Mass, Force, and Distance

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.

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.

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.

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

• friction
• gravity
• force
• unbalanced force

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.

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

• weight
• work
• force
• energy

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

• 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.

• 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.

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

• friction
• gravity
• force
• unbalanced force