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kupik [55]
3 years ago
15

AP physics Will give brainliest to correct answer.

Physics
2 answers:
rjkz [21]3 years ago
6 0

Answer:

the 4th one

Explanation:

tangare [24]3 years ago
6 0
The answer is the 4th one
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Then energy needed = 0.005 x sp.heat.cap x 10
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Mechanical energy is the sum of kinetic and potential energy in an object. It is energy in an object due to its motion, position
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A child is riding in a child-restraint chair, securely fastened to the seat of a car. Assume the car has speed 47 km/h when it h
Elina [12.6K]

Answer: F = 1235 N

Explanation: Newton's Second Law of Motion describes the effect of mass and net force upon acceleration: F_{net}=m.a

Acceleration is the change of velocity in a period of time: a=\frac{\Delta v}{\Delta t}

Velocity of the car is in km/h. Transforming it in m/s:

v=\frac{47.10^{3}}{36.10^{2}}

v = 13 m/s

At the moment the car decelerates, acceleration is

a=\frac{13}{0.2}

a = 65 m/s²

Then, force will be

F_{net}=19(65)

F_{net} = 1235 N

The horizontal net force the straps of the restraint chair exerted on the child to hold her is 1235 newtons.

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2 years ago
Which shows the correct order of forces, from weakest to strongest?
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^^^^^^^^^^^^^^^^^^^^^^^^^^^
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2. A construction consultant may be responsible for
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This is a tricky one but on my part I'd have to say depending on the contract A,B,C.

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