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An object is dropped from rest at a height of 300 m. a. Find the velocity after 2 seconds. b. Find the time it takes for the object to reach the ground.               c. With what velocity does it hit the ground?

An object is dropped from rest at a height of 300 m. a. Find the velocity after 2 seconds. b. Find the time it takes for the object to reach the ground.               c. With what velocity does it hit the ground?

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  1.  a.) Draw the distance vs. time graph. Find the slope.
     b.) Describe the graph line.  What does it imply?
  2.  a.) Draw the speed vs. time graph. Find the slope.  Describe the graph line.  What does it imply?
     b.)  Find the slope of the graph and compare it with the calculated acceleration.
  3. Describe the motion of a freely falling body based on the results obtained.
  4. If, by some suitable mechanism, the falling body had been given an initial downward push instead of being just released, would the resulting value of `g’ have been different? Explain.

Problems:

  1. An object is dropped from rest at a height of 300 m.
    a. Find the velocity after 2 seconds.
    b. Find the time it takes for the object to reach the ground.
                  c. With what velocity does it hit the ground?
  2. A car starting from rest is accelerated 15 m/s2. In how many seconds will its velocity be equal to 100 m/s? How far will it have traveled during this same time?
Data and Results Frequency of the tuning fork: 128v/s No. of crests = 5 Time interval = 0.03906 sec. or 0.04 sec Time interval Distance interval Speed (cm/s) Acceleration No. of time (sec) (cm) cm/s? Interval 1. 0.04 2.0 50 1250 2 0.04 4.0 100 1250 3 0.04 5.2 130 750 4 0.04 6.5 162.5 812.5 5 0.04 7.5 187.5 625 Average 0.04 5.04 126 937.5 Average acceleration (Experimental value) 937.5 cm/s? True Value for acceleration due to gravity "g" 980 cm % of error 4.37% Calculations:
Transcribed Image Text:Data and Results Frequency of the tuning fork: 128v/s No. of crests = 5 Time interval = 0.03906 sec. or 0.04 sec Time interval Distance interval Speed (cm/s) Acceleration No. of time (sec) (cm) cm/s? Interval 1. 0.04 2.0 50 1250 2 0.04 4.0 100 1250 3 0.04 5.2 130 750 4 0.04 6.5 162.5 812.5 5 0.04 7.5 187.5 625 Average 0.04 5.04 126 937.5 Average acceleration (Experimental value) 937.5 cm/s? True Value for acceleration due to gravity "g" 980 cm % of error 4.37% Calculations:
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