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mart [117]
3 years ago
7

Another coin is thrown up into the air and hit the ground after 6s with a velocity of -60 m/s after experiencing an acceleration

of -9.8 m/s2. What was its initial velocity?
Physics
1 answer:
Grace [21]3 years ago
7 0

Answer:

Vf = Vi + a t       fundamental equation

-60 m/s= Vi - 9.8 m/s^2 * 6 sec      taking upward direction as positive

Vi =58.8 m/s - 60  m/s = -1.2 m/s   so the coin was initially thrown downward

As a check take the downward direction as positive

Vf = 1.2 m/s + 58.8 m/s = 60 m/s  

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Given that a train travels at a speed of 30 m/s. The train starts at an initial position of 1000 meters and travels for 30 seconds.

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