1. Click the "reset" button (the round, orange button on the upper right-hand corner) of the same simulation to clear all the current settings. 2. Tick all the items (force, values, masses, speed) inside the yellow box. Remove the crate from the top of the skateboard and place it inside the box (lower left). 3. Position the 40-kg child on top of the skateboard. You have to observe its acceleration within a 5-second time interval by referring to Step 4. Use a digital stopwatch as a timer. 4. Set the force at 50 N. The skateboard and its load will then start moving. Stop the motion of the body by pressing the "pause" button AFTER FIVE (5) SECONDS (starting from the time you set the force as 50 N). Check the speed (refer to the speed shown in the circle, upper left) reached by the body within the 5-second time interval. Record this value in Table 1 as the final velocity of that particular item. 5. Do the same for all the other items listed in the table below. Click "reset" every time you start with a new item, and always tick all the items inside the yellow box. Remove the crate (the default setting) on top of the skateboard before placing a new item, unless the crate itself is the item you need to select. The force must be the same (50 N) for all these items. 6. Compute for the acceleration of all the items considered and record the data in the last column. The acceleration is equal to final velocity - initial velocity divided by time (time equals 5 seconds for all the items). TABLE 1: ACCELERATION OF DIFFERENT BODIES AT 50-N FORCE ITEM MASS (kg) INITIAL VELOCITY (m/s) FINAL VELOCITY (m/s) ACCELERATION (m/s2) child 40 0 crate 50 0 man 80 0 metal trash bin 100 0 refrigerator 200 0 PART B - GUIDE QUESTIONS: