The first mechanized industry was
1 answer:
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Answer:
Explanation:
Here we know that pile will go down under gravity for d = 4.20 m before coming in contact with beam
Now after being in contact with the beam the pile further go down by L = 15.4 cm.
Finally it will come to rest.
So here we can say that work done by gravity + work done by beam on the pile must be equal to change in its kinetic energy
So here we have
Answer:
T = 5.66 s
Explanation:
The system formed by the bar plus ball forms a physical pendulum
w =
the moment of inertia of a rod held at one end is
I = m L²
we substitute
w =
in this case the turning distance and the length of the rod are equal
d = L
w =
angular velocity and period are related
w = 2π / T
2π / T =
T = 2π
let's calculate
T = 2π
T = 5.66 s