Save Our Brains NC PS.5.2.1 – Version 3

Which choice best explains why a loaded wagon needs a stronger push to speed up than an empty wagon?

Elena wants to investigate how changing the mass of a cart affects its motion. Elena carries out this investigation:

• She places a small cart at a starting line on a smooth surface.
• She gives the cart the same push in each test.
• She records the cart’s position every second.
• She first tests the cart with one box.
• She repeats the test with four identical boxes.

Elena pushed the cart with the same force in both tests.

Select two statements that explain the difference in the cart’s motion.

Elena wants to investigate how changing the mass of a cart affects its motion.

Elena carries out this investigation:

• She places a small cart at a starting line on a smooth surface.
• She gives the cart the same push in each test.
• She records the cart’s position every second.
• She first tests the cart with one box.
• She repeats the test with four identical boxes.

Elena repeats the investigation with six identical boxes on the cart and gives it the same push.

What will most likely happen?

Place each scenario in the column that shows which factor most affects the change in motion.

Put the steps in order to show how to investigate whether adding mass changes a wagon’s motion, starting with the first step.