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Degger [83]
3 years ago
14

PLEASE HELP ASAP URGENT!!!!!

Physics
1 answer:
coldgirl [10]3 years ago
5 0

Answer:

B

i am not fully sure but i believe its the most accurate its either A or B

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A skateboarder starting from rest accelerates down a ramp at 2 m/s for 2 s. What is the final speed of the skateboarder?
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Answer: 4m/s

Explanation:

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What is the longest wavelength of light that will emit electrons from a metal whose work function is 3.70 eV
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Answer:

h f = Wf + K

where the total energy available is h f, Wf is the work function or the work needed to remove the electron and K is the kinetic energy of the removed electron

If K = zero then hf = Wf

Wf = h f = h c / λ    or

λ = h c / Wf = 6.63E-34 * 3.0E8 / (3.7 * 1.6E-19)

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2 years ago
How far will a rubber ball fall in 10 seconds?
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If it's not moving at all at the beginning of the 10 seconds, then it falls 490 meters straight down in 10 seconds.

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4 0
3 years ago
An object moving at 15 m/s slows uniformly at a rate of 2.0 m/s each second for 5.0 s. What is its final speed?​
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Hey there!

We are given ,

Acceleration, a = -2m/s^2

Initial velocity , u = 15m/s

Time , t = 5 seconds

We know that ,
V=u+at

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Hope this helps you dear :)
Have a good day <3

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Given

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So, the moment of inertia of the beam is

I=\dfrac{ml^2}{12}=\dfrac{5\times 2^2}{12}\\\\I=\dfrac{5}{3}\ kg.m^2

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7 0
3 years ago
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