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3 years ago

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Energy Calculation 4. What is the gravitational potential energy of an object that has a mass of 100kg it is 10m off of the grou

nd? The gravity on Earth is measured at 9.8N/kg

1 answer:

konstantin123 [22]3 years ago

3 0

100kg * 9.8N/kg * 10m = 9800

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1) The distance travelled by the electron is $1\cdot 10^{17} m$

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Explanation:

1)

The electron in this problem is moving by uniformly accelerated motion (constant acceleration), so we can use the following suvat equation

$v^2-u^2=2as$

where

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For the electron in this problem,

$u=5\cdot 10^6 m/s$ is the initial velocity

v = 0 is the final velocity (it comes to a stop)

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Solving for s, we find the distance travelled:

$s=\frac{v^2-u^2}{2a}=\frac{0-(5\cdot 10^6)^2}{2(-1.25\cdot 10^{-4})}=1\cdot 10^{17} m$

2)

The total time taken for the electron in its motion can also be found by using another suvat equation:

$v=u+at$

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v is the final velocity

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a is the acceleration

t is the time taken

Here we have

$u=5\cdot 10^6 m/s$

v = 0

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And solving for t, we find the time taken:

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