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An object of mass 0.05 kg is launched vertically upward and reaches its maximum height in 1 second. What was its initial vertical speed?

A. 9.8 m/s
B. 0.10 m/s
C. 0.49 m/s
D. 1 m/s
E. 196 m/s

Answer :

Final answer:

The initial vertical speed of an object of mass 0.05 kg, launched vertically and reaching its maximum height in 1 second, was 9.8 m/s.

Explanation:

In physics, the velocity of an object launched vertically upward reaching maximum height is determined by theformula: v = u - gt where u is the initial speed, v is the final velocity (which is 0 at the maximum height), g is the acceleration due to gravity (9.8 m/s² on Earth), and t is time. Given that the object reaches its maximum height in 1 second, we can rearrange the formula to calculate the initial speed: u = v + gt. Substituting the given values, u = 0 + 9.8*1 = 9.8 m/s. Therefore, the initial vertical speed of the object was 9.8 m/s.

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