Marbles A group of students is building a marble track. They plan to investigate how the potential and kinetic energies of different types of marbles change as the marbles move through the track. Figure 1 shows the two types of marbles and the different materials the students will use in the investigation.

fig1
The two types of marbles are identical in size, but are made of different materials and have different masses. The students run several trials using each marble. The students begin each trial by placing a marble at the starting position and then observing the marble until it reaches the end position on the track.

The marble track is shown in Figure 2.

fig2
The students measure how each marble’s potential and kinetic energies change at five different points as each marble moves along the track.

Part A
One student wants to increase the potential energy of the marble at the starting position. Explain one way the students can adjust the track to increase the marble’s potential energy.

In your explanation,
 describe the dimensions of any materials used to adjust the track and
 explain why the adjustment to the track would increase the marble’s potential energy.