3 years ago

1d. Conservation of energy is demonstrated in this roller coaster example.

Physics

1 answer:

Dvinal [7]3 years ago

6 0

Answer:

can you clear your question I can't understand

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A rock falls off a cliff. How fast will it be going after falling for 4.33 seconds?

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Answer:42.43m/s

Explanation:According to vf=vi+at, we can calculate it since v0 equals to 0. vf=0+9.8m/s^2*4.33s= 42.434m/s

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When a cup is placed on a table, which force prevents the cup from falling to the ground?

pshichka [43]

I believe it is normal force.

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Two men are standing on a frictionless ice surface holding opposite ends of a rope. One man (mass = 80 kg) pulls on the rope wit

ankoles [38]

Answer:

The acceleration of man 1 and 2 is $3.125\ m/s^2$ and $4.167\ m/s^2$ .

Explanation:

Mass of man 1, m₁ = 80 kg

Mass of man 2, m₂ = 60 kg

One man pulls on the rope with a force of 250 N.

Let a₁ is acceleration of man 1,

F = m₁a₁

$a_1=\dfrac{F}{m_1}\\\\a_1=\dfrac{250}{80}\\\\a_1=3.125\ m/s^2$

Let a₂ is acceleration of man 1,

F = m₂a₂

$a_2=\dfrac{F}{m_2}\\\\a_2=\dfrac{250}{60}\\\\a_2=4.167\ m/s^2$

So, the acceleration of man 1 and 2 is $3.125\ m/s^2$ and $4.167\ m/s^2$ .

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A solar collector is a device that absorbs ___________from the sun ?

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Answer:

SUNLIGHT OR SUNRAYS OR ENERGY OR HEAT

Explanation:

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The correct option is

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