A paper tape was attached to a moving trolley and allowed to run through a ticker-timer. The figure below shows a section of the tape.

A paper tape was attached to a moving trolley and allowed to run through a ticker-timer. The figure below shows a section of the tape.

If the frequency of the ticker-timer is 20Hz, determine:
a) The velocity between AB and CD.
b) The acceleration of the trolley.

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a)1tick= 1/20 =0.01s
VAB= 15cm/(5ticks x 0.01s) =15cm/0.05s
=300cm/s
VCD=30cm/(5ticks x 0.01s) =30cm/0.05s
=600cm/s.

b)
VAB?t=2ticks x 0.01=0.2s VCD
Therefore, acceleration=(VCD- VAB)/?t= (600-300)cms-1/0.2s =3000cms^-2.

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sharon kalunda answered the question on April 23, 2019 at 09:09

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