45. a particle moves in a straight line with an initial velocity of 30 m/s and constant acceleration 30 m/s2 . (a) what is its displacement at t = 5 s? (b) what is its velocity at this same time?

Velocity at 5 seconds: 180 m/s

Ditance: 525 meters

Explanation:

In order to calculate displacement in this option we need to use the formula for distance when an object is experimenting aceleration:

So now we just have to insert the data that we know:

The distance after 5 seconds with an initial velocity of 30 m/s and an acceleration of 30 m/s will be 525 meters.

And the final velocity is calculated by the next formula:

So the final velocity at 5s would be 180 m/s

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