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How long will it take a ball that falls from rest to attain a final velocity of 147m/s?

User JLavoie
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1 Answer

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Final answer:

The time it takes for a ball to attain a final velocity of 147 m/s when falling from rest can be calculated using the formula v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time. Plugging in the values, the time is 15 seconds.

Step-by-step explanation:

The time it takes for a ball to attain a final velocity can be calculated using the formula:

v = u + at

Where:

  • v is the final velocity
  • u is the initial velocity
  • a is the acceleration
  • t is the time

In this case, the ball is falling from rest, so the initial velocity u is 0. The final velocity v is 147 m/s.

The acceleration due to gravity is approximately 9.8 m/s^2. Plugging these values into the formula:

147 = 0 + 9.8t

Solving for t gives:

t = 147/9.8 = 15 seconds

Therefore, it will take the ball 15 seconds to attain a final velocity of 147 m/s.

User Sudoremo
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