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A. 28 ms' B, 16 ms' C. 12 ms' D. 8 ms
A bird begins to accelerate at a constant 0.3 m/s' for 3 s, its change in
velocity is
A. 0.9 m/s B. 1.5 m/s C. 1.95 m/s
D. 2.4 m/s
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A car is going backwards at 5 m/s. After 10 s of uniform acceleration,
the car is going forward at 10 m/s. The acceleration is
A. 0.5 m/s B. 0.75 m/s C. 1.5 m/s
D. 5 m/s
The slope of distance time graph represents:
A. acceleration B. change in acceleration C. speed D. distance
The area under a speed-time graph represents:
A. acceleration B. change in acceleration C. distance D. velocity
for every
A student riding his bicycle on a straight flat road covers one block
every 7 seconds. If each block is 100m long, he is traveling

i'm on my way to history not a mistory.

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.

can u provide the graph and if its not possible

then i can tell u the segment where the

average time interval starts degrading is the segment where the car is slowing down