Force and Motion Quiz 4

Picking up a heavy box is much more difficult than putting it down. What is a

likely explanation for this?

• Pushing force is more difficult to accomplish than pulling force.

• The force of gravity acts against you when you try to push something to the

  ground.

• The action is less difficult because nothing is pulling the object toward the

  ground.

• The force of gravity is pulling the box toward the ground which makes the

  action of putting the box down easier to do.

Some students were investigating which surfaces would allow a ball to roll the farthest. Which of the following

would be essential in their investigation?

• Stopwatch, meter stick, calculator, soccer ball, 41⁄2-foot–tall student

• Grassy field, gym floor, concrete sidewalk, soccer ball, meter stick

• Soccer ball, bowling ball, beach ball, stopwatch, meter stick

• 4-foot-tall student, 41⁄2-foot-tall student, 5-foot-tall student, soccer ball, meter stick

This experiment can be used to determine —

• how mass affects the force needed to move objects

• how force affects the mass of two objects

• how the force used to pull a dictionary affects the mass of a box of marbles

• how the mass of a box of marbles affects the mass of a dictionary

A force that pulls objects toward Earth's center

• push

• friction

• gravity

• pull

Which procedure should students include in their design?

• Conduct five trials, using a different scale to pull each block of wood

• Conduct five trials, pulling a different side of each block each time

• Conduct five trials, using a different table for each trial

• Conduct five trials, pulling each block of wood in the same way for each trial

Picking up a heavy box is much more difficult than putting it down. What is a

likely explanation for this?

• Pushing force is more difficult to accomplish than pulling force.

• The force of gravity acts against you when you try to push something to the

  ground.

• The action is less difficult because nothing is pulling the object toward the

  ground.

• The force of gravity is pulling the box toward the ground which makes the

  action of putting the box down easier to do.

A push or pull that acts on an object

• force

• motion

• pull

A student uses a spring scale to pull a 50-gram block horizontally across a wood desk. Then the student pulls the block the same distance across surfaces of carpet, sandpaper, and glass. Which question is this investigation most likely designed to answer?

• How do blocks of different sizes react to force?

• How do different surfaces affect the amount of force needed to move a block?

• How do blocks affect spring scales?

• How does the mass of a block change when it is pulled across a desk?

A student designs an experiment to test the force of spring using a spring launcher and four spheres with the same diameter but with different masses. What other piece of equipment would be most useful for this experiment?

• A graduated cylinder to measure a volume of each sphere before the sphere is launched.

• A beaker to collect the spheres after they have been launched

• A stopwatch to measure how long it takes to load each sphere on the spring

• A meter stick to measure the height each sphere reaches after the sphere is launched

Which of the procedures below would provide the most reliable data?

• A. Pull each type of shoe once and record the results.

• B. Pull each type of shoe twice and record the results of each trial.

• C. Pull each shoe five times and record the results of each trial.

• D. All of the procedures have the same reliability.