Unit Conversion Worksheet - Physics & Physical Science ...



Station A Determining Muzzle Velocity of a Nerf Gun

Materials: Nerf pistol

Meter stick

Small level

Long measuring tape

Large protractor

Procedure:

• Shoot a single Nerf dart horizontally from 1 meter off the ground. Use the meter stick to get the correct height and use the level to make sure the shot is perfectly horizontal.

• Measure the distance the dart traveled from the tip of the dart in the gun to where it first hits the ground.

• Repeat the shot for a total of five times. Average the distance.

• Calculate how long the dart takes to fall from 1 meter using the equation: [pic].

• Use the average distance the dart traveled and the time it takes to fall to calculate the muzzle velocity of the gun.

|Dart # |Distance in Meters |

|1 | |

|2 | |

|3 | |

|4 | |

|5 | |

|Average | |

Time for the dart to fall 1 meter: _______________ seconds

Muzzle velocity of the Nerf dart: V = ______________ m/s

Type of dart used: Suction cup dart

(circle one)

Streamline darts

Continue to Part 2 on the back

Part 2 – Predicting the Distance and Experimental Results

Procedure:

• Use the muzzle velocity (V) to calculate the distance the Nerf dart will travel at an angle of [pic][pic] and [pic] Fill in the table below with your calculations.

|Angle |Vx |Vy |Time Up |Total Time |Distance |

|[pic] | | | | | |

|[pic] | | | | | |

|[pic] | | | | | |

• Use the large protractor to angle the gun at the [pic]and shoot the dart from the ground.

• Measure the distance the dart traveled to an accuracy of 1 cm using the large tape. (Your data should be written as 12.34 m.)

• Repeat the test shot for a total of 5 times at [pic]and average the distance.

• Repeat the test for [pic]and [pic], but stop the test if the darts are hitting the ceiling.

|Angle |Trial 1 |Trial 2 |Trial 3 |Trial 4 |Trial 5 |Average Distance |

|[pic] | | | | | | |

|[pic] | | | | | | |

|[pic] | | | | | | |

Conclusion

How accurate were your predictions? Detail your results, include any errors in your prediction and explain possible causes for the errors.

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Station B Determining the Height of the Ceiling using a Ball and a Stopwatch

Materials: Meter stick

Stop watch

Soft rubber ball

• Estimate the height of the ceiling using visual references.

Thrower 1: Estimated height: _____________ meters

Thrower 2: Estimated height: _____________ meters

• Gently toss the ball straight up into the air so it just barely touches the ceiling. This will take quite a few tries. Do not use the trial if the ball touches the ceiling or if the ball is not within one or two inches of the ceiling.

• Try to release and catch the ball from the same height. Measure and note that height.

Thrower 1: ___________________ Throwing height: ____________ meters

Thrower 2: ___________________ Throwing height: ____________ meters

• Use the stop watch to time how long it takes the ball to leave your hand and return to your hand. It is best to have the person throwing and catching the ball also use the stopwatch. Your partner should carefully watch the ball and determine if the ball was close enough to the ceiling without touching it.

• Record your results keeping the accuracy of the stopwatch (.01 seconds).

|Thrower |Trial 1 |Trial 2 |Trial 3 |Trial 4 |Trial 5 |Average |Time up |

| | | | | | | | |

| | | | | | | | |

• Average the five trials for each thrower.

• Divide the time in half to determine the time up (or time down).

• Using the time up to calculate the height of the throw to the ceiling using the formula [pic]

• Use the table below. Add the throwing height and the calculated height to come up with a calculation for the ceiling height.

|Thrower |Throwing Height |Calculated Height |Ceiling Height |

| | | | |

| | | | |

• Average the ceiling height. Ceiling Height = _____________________ meters

Conclusion

How accurate were your predictions? Detail your results, include any errors in your prediction and explain possible causes for the errors.

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