015 10.0 points
a subway train starting from rest leaves a
station with a constant acceleration. at the
end of 7.13 s, it is moving at 12.4062 m/s.
what is the train's displacement in the first
4.91257 s of motion?
answer in units of m.

20.996 m

Explanation:

Given:

Initial velocity,

Final velocity,

Total time taken, s.

∴ Acceleration is given as,

m/s²

Now, using Newton's equation of motion, we find the displacement.

Displacement is given as:

Plug in 0 for , 4.91257 for and 1.74 for . Solve for .

This gives,

Therefore, the train's displacement in the first 4.91257 s of motion is 20.996 m.

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..