please be so kind to answer all. projectile motion lab experiment. thank you...
ID: 3280584 • Letter: P
Question
please be so kind to answer all. projectile motion lab experiment. thank you...
PROCEDURE Adjust the angle of the mini launcher to zero degrees so the ball will be shot horizontally. Put the ball into the mini launcher and cock it to the first position. Fire one shot to locate where the ball hits the floor. At this position, use some painters tape to tape a piece of paper to the floor 1. 2. Fire 10 shots. Measure the vertical distance y from the bottom of the ball as it leaves the barrel to the floor. Use a plumb bob to find the point on the floor and that is directly beneath the release point on the barrel. Measure the horizontal distance x along the floor from the release point to each on the paper. Calculate the average and standard deviation of the horizontal distances. Use y to calculate the time of flight t. Then use t and x to calculate the initial velocity. Show all calculations and record these values in your lab book. Adjust a mini launcher to launch at an angle between 20 and 60 degrees above the horizontal. Record this angle in your logbook. Using your values of y and v, calculate the new time of flight and the new horizontal range for a projectile launched at the new angle. Since you have an uncertainty in an initial velocity, you will also have an uncertainty in your projected range. Calculate maximum and minimum predicted range. Draw a line across the middle of a white piece of paper and you some painters tape to tape the paper on the floor so the line is at the predicted horizontal distance from the m mini launcher. Draw two more lines at your maximum and minimum predicted range. Shoot the ball 10 times. Measure the 10 distances and take the average and standard deviation. 3. 4. 5. 6. Of the 10 shots fired at an angle how many fell within your predicted range? Based on this number, which do you feel plays a larger role in this experiment, systematic or statistical errors? Explain your reasoning. When the projectile was launched at an angle above the horizontal, which was a larger: half the distance between your maximum and minimum predicted ranges or the standard deviation in the average range of the ball? What measurements contributed the greater statistical error to your results? 7.Explanation / Answer
1. Vertical launcher shoots the projectile upwards and then horizontally the projectile falls. If we take the horizontal launcher, we would need to keep it at some height to observe the projectile motion.
3. The initial velocity can be measured using the newton's first law of motion as
v=u+a*t
where v is the final velocity, u is the initial velocity, a is the acceleration and t is the time taken.
No both methods are equivalent.
4. To measure the final velocity we can use only one time interval, provided we have information about, velocity at start of that interval along with the other variables.
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