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3 years ago

A ball is thrown vertically upward with a speed of 25.0 m/s from a height of 2.0 m.

Physics

1 answer:

Marrrta [24]3 years ago

4 0

Answer:

The answer to your question is

a) t = 2.55 s

b) t = 5.5 s

Explanation:

Data

vo = 25 m/s

h = 2 m

g = 9.81 m/s

Formula

t = -(vo)/g

t = -(25)/9.81

t = 2.55 s

Tt = 2t

Tt = 2(2.55)

Tt = 5.1 s

Time in the last 10 m

10 = 25t + (1/2)(9.81)t²

Simplify

10 = 25t 4.91t²

4.9t² + 25t - 10 = 0

Solve the equation using an online calculator

t₁ = 0.37 s t₂ = -5.47 s

The correct answer is t₁, t₂ is incorrect because there are no negative answers.

Total time = 5.1 + 0.37

= 5.5 s

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