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iren2701 [21]
3 years ago
10

A stone that starts at rest free falls for 7.0 s. How far does the stone fall in this time?

Physics
1 answer:
vredina [299]3 years ago
7 0

Gravitational acceleration is approx 9.8 m/s
Time is 7s

a=9.8 m/s
t=7s

a = d/t^2

therefore:

d = a * t^2

d = 9.8 * 7^2

d = 9.8 * 49

d = 480.2 [m]

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Answer:

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Explanation:

F=ma

F: force

m: mass

a: aceleration

66 = 45a

a=66/45= 22/15 ≅ 1,4666 m/s²

4 0
3 years ago
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True, the path of the ball, as observed from the train window, will be a horizontal straight line.

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However, if the reference point is moving at the same velocity as the object, the path of the object's motion appears to be a straight line.

When the ball is released from the window of the train, it will move at the same constant velocity as the train, and the path of the ball's motion observed from the train window will be a straight line.

Thus, we can conclude that the given statement is true. The path of the ball, as observed from the train window, will be a horizontal straight line.

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