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juin [17]
3 years ago
9

Two kids are playing tag. The first kid is running at an unknown speed chasing the other. The first kid has a mass of 25 kg and

a KE of 450 J.
How fast is the first kid running?
I really need help
Physics
1 answer:
Monica [59]3 years ago
3 0

Answer:

1mph

Explanation:

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Find the cost of excavating a space 84 ft long, 42 ft wide, and 9 ft deep at a cost of $39/yd3. (simplify your answer completely
m_a_m_a [10]

The cost of excavating a space of 84 ft long, 42 ft wide, and 9 ft deep is $45864

Information about the problem:

  • Space long= 84 ft
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To solve this problem, we have to state the equation using the information of the problem:

Calculating the volume of the total space:

space volume = space long * space wide * space deep

space volume = 84 ft * 42 ft * 9 ft

space volume = 31752 ft3

By converting the volume from ft3 to yd3, we have:

31752 ft3 * (0,037037 yd3 / 1 ft3) = 1176 yd3

Calculating the cost of excavating the volume space:

Total cost = space volume * cost by yard3

Total cost = 1176 yd3 * $39/yd3

Total cost = $45864

<h3>What is volume?</h3>

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A 4.79 g bullet moving at 642.3 m/s penetrates a tree trunk to a depth of 4.35 cm. Use work and energy considerations to find th
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Answer:

Force, F=2.27\times 10^4\ N

Explanation:

Given that,

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Distance, d = 4.35 cm = 0.0435 m

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Finally, it stops, v = 0

F.d=-\dfrac{1}{2}m(u^2)

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F=\dfrac{-0.00479\times (642.3)^2}{2\times 0.0435}

F = -22713.92 N

F=2.27\times 10^4\ N

So, the magnitude of the force that stops the bullet is 2.27\times 10^4\ N

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Which statement accurately describes the motion of the object in the graph above over 10 seconds? Group of answer choices The ob
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