A body thrown vertically upward reached its maximum height after 1.4 s.
| August 14, 2021 | education
A body thrown vertically upward reached its maximum height after 1.4 s. How fast was the body thrown? Neglect air resistance. Take the acceleration due to gravity equal to 10 m / s².
To find the value of the initial velocity of the specified body when throwing, we apply the formula: Vк = Vн + a * t = Vн – g * t, whence we express: Vн = Vк + g * t.
Variables and constants: Vк – speed at maximum height (Vк = 0 m / s); g – acceleration due to gravity (according to the condition g = 10 m / s2); t is the duration of the rise (t = 1.4 s).
Calculation: Vн = Vк + g * t = 0 + 10 * 1.4 = 14 m / s.
Answer: The throwing speed of the indicated body was 14 m / s.
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