A sled is rolled down a 72 m long mountain in 12 seconds. Determine their speed at the end of the path
| May 17, 2021 | education
A sled is rolled down a 72 m long mountain in 12 seconds. Determine their speed at the end of the path. The initial speed of the sled is zero.
To calculate the speed of a given sled at the end of the descent from the mountain, we apply the formula: L = (V + V0) * t / 2, whence V = 2L / t – V0.
Variable values: L – mountain length (L = 72 m); t is the duration of the descent of the sled (t = 12 s); V0 is the initial speed of the sled (V0 = 0 m / s).
Calculation: V = 2L / t – V0 = 2 * 72/12 – 0 = 12 m / s.
Answer: The sledge at the end of the descent from the mountain had a speed of 12 m / s.
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