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Kitty [74]
2 years ago
12

You push an object initially at rest across a frictionless floor

SAT
1 answer:
Ket [755]2 years ago
3 0

 t = t₀ / 2

Explanation:

In this exercise we must use Newton's second law

         F = m a

         a = F / m

now we can use kinematics

 as in object part of rest (v₀ = 0)

       v =a t₀

       t₀ = v / a

these results are with the first experiment

now repeat the experiment, but F = 2F₀

          a = 2F₀ / m = 2 a₀

         v = 2 a₀ t

         t = v / 2a₀

         t = t₀ / 2

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Explanation:

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2 years ago
Carmen earns $7.50 an hour pLu's tips ,as a waitress .Suppose she works 24hours in one week how much money in tips (x) must Carm
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The girl in the picture is at the highest point in swinging and starts to come down. Which statement best describes the changes
SpyIntel [72]

When she descends the potential energy will decrease at the same rate that the kinetic energy increases.

<h3></h3><h3>How to describe changes in energy?</h3>

We know that we can write the total energy of a moving object as:

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Where U is the potential energy and K is the kinetic energy.

In the given case, U will only depend on the height of the girl and it will be maximized when the height is maximum.

K = (1/2)*m*v^2

where m is the mass and v is the velocity.

When the girl is at the highest point, the velocity becomes equal to zero. This happens because at that point she stops going up and starts going down, so the velocity must be zero at that moment.

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E = U.

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If you want to learn more about energy, you can read:

brainly.com/question/166559

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2 years ago
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