Title : Projectile Motion

• First insert the steel ball into the launch chamber with your index finger and push the ball into the barrel.
• Pump the hand pump until it reaches your selected pressure. Now keep pumping until you hear the three small release sounds. Wait five seconds for the pressure to stabilize.
• Collect data using the following steps:
  • Click the “collect” button to start data collection.
  • Hold the cardboard box so you can catch the ball right after it leaves the projectile launcher. Do not let the ball hit the floor. This is important.
  • When you want to launch the ball, press and hold the arm button, and then press the launch button.
  • Record the speed in the data table.
• Repeat this process, catching the ball with the cardboard box until you complete a total of 10 launch speed measurements. Record the values of the speed in Table 1.
• Review your speed data of each trial and calculate the average speed values and identify the maximum and minimum values. Record those values in Table 2.
• Determine the launch height by:
  • Measuring the distance for the tabletop to the floor.
  • The launch chamber of the projectile launcher is 0.146 m above the surface of the table. So determine the total distance the ball will fall.
  • Record this total height value as the launch height, in table 2.
• Identify the floor origin and table offset:
  • The launch point is clearly marked on the projectile launcher. Position the projectile launcher so that you can figure out the distance from the launch point to the edge of the table, in line with the launch barrel. You will need this offset distance for later calculations. Record the offset values in table 2
  • Use a meter stick to locate the floor location just below the table edge. Mark this point with table as it will serve as the floor origin.
• Determine the predicted impact point range:
  • Use the average speed value to calculate your prediction for the range. The range is the horizontal distance the ball will travel. Record this prediction as the predicted range for the average speed in Table 3.
  • Subtract the table offset from the predicted range and record that value in Table 3 for predicted floor distance for the average speed.
  • To account for variations seen in the speed measurements, repeat the calculation for the minimum and maximum speeds. These two new points show the limits of impact range to be expected, considering the variations of the speed measurements. Record the predicted ranges and floor distances for the max and min speeds on the data table.
• . Tape a piece of waxed paper to the floor that is big enough to account for the different variations that you previously calculated. Remember that the waxed paper must be lined up with the launch chamber.
• Next launch the ball and allow it to strike the floor for the first time. Measure the distance from the floor origin to the actual impact point and enter the floor distance in the Table 4. Now calculate the range for the actual impact.

Observation Table :

A) u = constact

:

Sr. No.	Initial Velocity	θ	Range	Height	Time of flight
1	10	25	7.7	0.91	0.86
2	10	30	9	1.275	1.02
3	10	45	10	2.55	1.44
4	10	60	8.9	3.824	1.77

B) θ = constact

:

Sr. No.	Initial Velocity	θ	Range	Height	Time of flight
1	5	30	2.2	0.31	0.51
2	10	30	8.3	1.275	1.02
3	15	30	20	2.67	1.53
4	20	30	35.5	5.1	2.04