The equation of uniform rectilinear motion of the body has the form: x = 100-2t. What path will the body cover in 20s?

Data: ur-tion of movement of the specified body: x = 100 – 2t; t – duration of movement (t = 20 s).

1 way) Distance traveled: S = x (20) – x (0) = 100 – 2 * 20 – (100 – 2 * 0) = 100 – 40 – 100 – 0 = -40 m = 40 m (“-” means only the direction of reference).

Method 2) Distance traveled: S = V * t = x (t) ‘* t = (100 – 2t)’ * t = 0 – 2 * 1 * t = -2t = -2 * 20 = -40 m = 40 m.

Answer: In 20 s, the indicated body should have covered a path of 40 m.