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egoroff_w [7]
2 years ago
7

BERE

Physics
2 answers:
Kisachek [45]2 years ago
6 0

Answer:

All points to the left of zero are negative

Explanation:

ruslelena [56]2 years ago
3 0

Answer:

C

Explanation:

on edge

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You drop a pencil from your desk, which is 1 meter above the floor. How long does it take for the pencil to hit the floor? How f
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Answer:

1. 0.45 s.

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Explanation:

From the question given above, the following data were obtained:

Height (h) = 1 m

Time (t) =?

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1. Determination of the time taken for the pencil to hit the floor.

Height (h) = 1 m

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1 = ½ × 9.8 × t²

1 = 4.9 × t²

Divide both side by 4.8

t² = 1/4.9

Take the square root of both side

t = √(1/4.9)

t = 0.45 s.

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2. Determination of the velocity with which the pencil hit the floor.

Initial velocity (u) = 0 m/s

Acceleration due to gravity (g) = 9.8 m/s²

Time (t) = 0.45 s.

Final velocity (v) =?

v = u + gt

v = 0 + (9.8 × 0.45)

v = 0 + 4.41

v = 4.41 m/s

Thus, the pencil hit the floor with a velocity of 4.41 m/s

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