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31.05.2020 •
Physics
You are to make four straight-line moves over a flat desert floor, starting at the origin of an xy coordinate system and ending at the xy coordinates (−130 m, 22 m). The x component and y component of your moves are the following, respectively, in meters: (20 and 60), then (bx and −70.0), then (−20.0 and cy), then (−62.0 and −72.0).
(a) What is component bx?
(b) What is component cy?
(c) What is the the magnitude of the overall displacement?
(d) What is the angle of the overall displacement? *counterclockwise to the xaxis
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Ответ:
E = (1/2) * m * v ^2
For unit consistency, make sure that:
E energy is in joules (J)
m mass is in kilograms (kg)
v velocity is in meters per second (m/s)
So, substituting to the equation:
14= (1/2) * (17) * v^2
By algebraic manipulation, we derive:
v = (2*14/17)^0.5
v = 1.2834 m/s
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