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andreev551 [17]
3 years ago
6

An object accelerates to a velocity of 34m/s over a time of 1.3 s the acceleration it experienced was 15 m/s squared what was th

e initial velocity
Physics
2 answers:
just olya [345]3 years ago
7 0
V=v0+at=>v0=v-at=34-15•1,3=34-19,5=14,5m/s
Dmitriy789 [7]3 years ago
6 0

Answer:

Initial velocity, u = 14.5 m/s

Explanation:

It is given that,

Final velocity of the object, v = 34 m/s

Time, t = 1.3 s

Acceleration of the object, a=15\ m/s^2

To find,

Initial velocity of the object

Solution,

Let u is the initial velocity of the object. It can be calculated using the first equation of motion as :

v=u+at

u=v-at

u=34-15\times 1.3

u = 14.5 m/s

So, the initial velocity of the object is 14.5 m/s.

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We can set up the following equations with the information given:

\mathrm{(a)}\: 2.0\cdot 10^3=\frac{1}{2}\cdot 1000\cdot v^2, \\v=\fbox{$2\: \mathrm{m/s}$}

For part B, we have the same equation, but kinetic energy is now 2.0\cdot 10^5.

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Answer:

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