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.

weather forecasts are done by collecting data about the current state of the atmosphere mainly the temperature, humidity and wind and using meteorology, to determine the atmosphere that evolves over time. the h and l mean the high and low pressure. the red strip is a warm front. the blue strip is a cold front. the blue and red strip is a stationary front. the purple strip is a occluded front.

explanation: