4. (10 pts.) For your second set of simulations, we'll fix the force at 400 N to the right but change the mass. The box you start with is 50 kg. Add different masses by dragging a person or object to the skateboard and record the total mass. Describe the direction of motion. Finally, record the time it takes the skateboard to reach 40 m/s. You may need to practice this a few times with the stopwatch on your phone. Note: You should make the masses either increasing or decreasing down the rows. It'll make a relationship more obvious. Table 2 Force (N) Mass (kg) Time to Reach maximum speed (40 m/s) 400 400 400 400 400 400 5. Next, we'll repeat the simulation with a fixed mass but different forces. Choose a mass, any mass. Record it in Table 3 below. Then run the simulation for each force in the table. Record the time for the dummy to reach maximum speed. Table 3 Force (N) Mass (kg) Time to Reach maximum speed (40 m/s) 400 350 300 250 200 150 100 50 6. (2 pts.) Using table 2, describe the relationship between the time to reach maximum speed and the mass. 7. (2 pts.) Using Table 3, describe the relationship between the applied force and the time to reach maximum speed