Determine the initial speed of the sled if the descent time is 6 seconds
| March 15, 2021 | education
Determine the initial speed of the sled if the descent time is 6 seconds, the final speed is 25 m / s, and the acceleration is constant and uniform 0.5 m / s2.
Initial data: t (duration of descent) = 6 s; V (final speed of the sled) = 25 m / s; a (constant sled acceleration) = 0.5 m / s2.
We express the initial speed of the sled from the formula: V = V0 + a * t, whence V0 = V – a * t.
Calculation: V0 = 25 – 0.5 * 6 = 25 – 3 = 22 m / s.
Answer: The initial speed of the sled was 22 m / s.
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