Amplify Lesson 4.4 force & motion written response 2 Poll

In a warehouse, the workers sometimes slide boxes along the floor to move them. Two boxes were sliding toward each other and crashed. The crash caused both boxes to change speed. Based on the information in the diagram, which statement is correct? In your answer, explain what the forces were like and why the boxes changed speed.

* Box 1 has more mass than Box 2.

*Box 1 and Box 2 are the same mass.

* Box 1 has less mass than Box 2.

• Box 1 has less speed than box 2 because in the diagram you can see box 1 and 2 collide each other and after the crash you can see box 1 moving in opposite direction in a faster speed than before the crash. You can also see that Box 2 decreased its speed. This shows that box 1 has a lesser mass than box 2 because box one change its direction by bouncing off a heavier box.

• Box 1 has more mass than Box 2. I know this because when the two boxes crashed, they experienced the same strength force in opposite directions. Since Box 1 had less change in speed from this force, it must have more mass than Box 2. That's because when the same strength force is exerted on objects of different mass, the less massive object will have a greater change in velocity.

• Box 1 and Box two are the same mass because...

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