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777dan777 [17]
2 years ago
9

An object of mass m moves horizontally, increasing in speed from 0 to v in a time t. The power necessary to accelerate the objec

t during this time period is:
a: mv^2t/2
b: mv^2/2
c: 2mv^2
d: v sqrt /m2t
e: mv^2/2t
Physics
1 answer:
lana66690 [7]2 years ago
8 0

Answer:

Option e is correct.

Explanation:

An object of mass m moves horizontally, increasing in speed from 0 to v in a time t.

We know that,

Work done = change in kinetic energy

W=\dfrac{1}{2}m(v^2-u^2)

Here, u = 0

So,

W=\dfrac{1}{2}mv^2

Also,

Power = work done/time

So,

P=\dfrac{\dfrac{1}{2}mv^2}{t}\\\\=\dfrac{mv^2}{2t}

So, the correct option is (e).

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1. How much force is needed to accelerate a 66 kg skier<br> at 2 m/sec2?
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Answer:

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