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sladkih [1.3K]
2 years ago
9

2. A body is thrown vertically upward with a speed of 100 m/s.The time taken to be

Physics
1 answer:
Pachacha [2.7K]2 years ago
4 0

Answer:

b. 20 sec

Explanation:

y = y₀ + v₀ t + ½ g t²

0 = 0 + (100) t + ½ (-10) t²

0 = 100t − 5t²

0 = t (100 − 5t)

t = 0, t = 20

The body lands after 20 seconds.

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      \frac{mgL}{2} = \frac{1}{2}kx^{2} + \frac{1}{6}mv^{2}

Putting the given values into the above formula as follows.

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