Force and Motion Quiz 2

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

A force that resists and slows down the motion of an object

• push

• motion

• friction

• 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

Students drop the same heavy ballon to identical blocks of soft clay from different heights. For each height they

measure the depth of the dent the ball makes in the clay.

Why is the depth of the dent different in each trial?

• The size of the ball changes.

• The material of the ball changes.

• The mass of the ball when it hits the clay changes.

• The force of the ball when it hits the clay changes.

The diagrams show two trials of an experiment in which a spring scale was used to measure force. 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

Which question about the effect of force on an object could be answered by conducting a classroom experiment?

• What type of surface produces the most friction?

• How does gravity affect the movement of comets?

• What evidence supports the theory of black holes?

• How does air resistance cause airplane failure?

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.