Unit 4: Motion and Stability Study Guide

Kendra decided to set up an experiment where she would hit all 3 marbles at the same time utilizing the exact same force. She then watched them travel a distance of 10 feet where she placed a finish line. What order do you think the marbles crossed the finish line?

• 1st: Red 2nd: Yellow

  3rd: Blue

• 1st: Blue 2nd: Red

  3rd: Yellow

• 1st: Red 2nd: Blue

  3rd: Yellow

• 1st: Yellow 2nd: Red 3rd: Blue

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How does the weight (or mass) of a marble affect the speed (rate) it travels when struck by the same force?

• Heavier marbles travel faster

• Lighter marbles travel faster

• Weight does not affect speed

• Speed is the same for all marbles

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If each marble was traveling at 5 miles per hour (mph), which marble would take the least amount of force to stop?

• The Red Marble

• The Yellow Marble

• The Blue Marble

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Which marble would require the greatest amount of force to stop?

• Red Marble

• Blue Marble

• Yellow Marble

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How does the object remain at a constant speed if mass is increased?

• By decreasing the force applied

• By increasing the force applied

• By maintaining the same force

• By reducing friction

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Based on the graph, which point or points could represent when they sat down at a McDonald’s and had a burger?

• Point A

• Point B

• Point C

• Point D

Point A represents them driving at a constant speed.

• True

• False

Sonic and Mario are stopped at point B.

• True

• False

Point C shows the Jeep has stopped its motion.

• True

• False

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A group of kindergarten students were playing on a metal slide the day after it rained and noticed they were not sliding really well because a new substance called rust had formed making the slide feel like sandpaper. This rust caused ______________________________ which is what slowed them down. They decided to clean all the rust off and get the metal slide slick again which resulted in ______________________________. Because gravity is what pulls them down the slide, they all used an ______________________________ each time.

• increased friction, decreased friction, equal force

• decreased friction, increased friction, decreased force

• increased force, decreased force, increased friction

• equal force, increased force, decreased force