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hannahroswall1
10.03.2021 •
Physics
You are told that the density of an object is 5 g/mL. If you place it into liquid that has a density of 3 g/mL, will it float or sink?
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Ответ:
Given,
The initial position of the boat, d_i=(5i-2j+4k) m
The initial velocity of the boat, u=(4i+j-3k) m/s
The time period, t=8 s
The final velocity of the boat, v=(12i-7j+13k) m/s
To find:
a) The position of the object after 8 s
b) The acceleration of the object.
Explanation:
a)
From the equation of motion, the total distance traveled by the object is given by,
On substituting the known values,
Thus the final position of the boat is,
b)
The acceleration of an object is given by,
On substituting the known values,
Final
a) Thus the position of the boat after 8 s is
The acceleration of the boat is