The laws of motion of two point bodies are given: a) x = 3 + 5t b) x = 7-t, where x is the coordinate in m
| September 9, 2021 | education
The laws of motion of two point bodies are given: a) x = 3 + 5t b) x = 7-t, where x is the coordinate in m, t is the time in c. 1.determine the coordinates of the bodies at the time moment t = 1c 2.determine the times when the coordinates of the bodies are x = 4m.
a) x = 3 + 5 * t.
t1 = 1 s.
x2 = 4 m.
t2 -?
x1 -?
x1 = 3 + 5 * t1.
x1 = 3 + 5 * 1 s = 8 m.
x2 = 3 + 5 * t2.
t2 = (x2 – 3) / 5.
t2 = (4 – 3) / 5 = 0.2 s.
Answer: t2 = 0.2 s, x1 = 8 m.
b) x = 7 – t.
t1 = 1 s.
x2 = 4 m.
t2 -?
x1 -?
x1 = 7 – t1.
x1 = 7 – 1 = 6 m.
x2 = 7 – t2.
t2 = 7 – x2.
t2 = 7 – 4 = 3 s.
Answer: x1 = 6 m, t2 = 3 s.
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