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vaieri [72.5K]
3 years ago
9

A car has an engine which delivers a constant power. It accelerates from rest at time t = 0, and at t = t0 its acceleration is a

0. What is its acceleration at t = 2t0? Ignore energy loss due to friction. ...?
Physics
1 answer:
olga2289 [7]3 years ago
7 0
Here is the answer of the given problem above.
Use this formula: <span>P = FV = ma*at = ma^2 t
</span><span>Substitute the values, and therefore, we got m(a0)^2t = m(x)^2 (2t)
then, solve for x which is the acceleration at 2t.
</span>The <span>answer would be a0/sqrt(2).
Hope this answers your question. Thanks for posting.
</span>
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A bar on a hinge starts from rest and rotates with an angular acceleration α = 12 + 5t, where α is in rad/s2 and t is in seconds
Rama09 [41]

Answer:

Ф = 239.73 rad

Explanation:

α = 12 + 15×t

W = ∫α×dt

   = ∫(12 + 5×t)×dt

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then:

Ф = ∫W×dt

   = ∫(12×t + 2.5×t^2)dt

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therefore the angle at t = 4.88s is:

Ф = 6×(4.88)^2 + 5/6×(4.88)^3

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5 0
3 years ago
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borishaifa [10]

Correct answer choice is:

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balandron [24]

Answer:

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Explanation:

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3 years ago
Please help extra points!!!!
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Answer:

If you increase either mass or velocity, the momentum of the object increases proportionally.

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