All Questions
5 questions
2
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Can't wrap my head around the energy formula being half of mass times velocity squared [duplicate]
I'm trying to understand the "Why" of this equation but can't make sense of it, my intuition breaks down.
When I think intuitively of energy, I think of "How powerful the impact will be ...
- 131
4
votes
3
answers
794
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Why is harder to accelerate object at higher speeds if speed is relative term?
Why is it harder to accelerate object at higher speeds (even if resistance forces dont exist) if speed is a relative term?
Object speed is relative term, it depends from wich frame of reference we are ...
- 730
4
votes
2
answers
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Why the formula of kinetic energy assumes that the object has started from an initial velocity of zero?
According to my physics textbook, the formula of kinetic energy is:
$$
W = \frac{1}{2}mv^2
$$
Where $m$ is is mass of the object and $v$ is the velocity of the object. The equation is calculated from ...
1
vote
3
answers
2k
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Energy consumption from acceleration
I have an interesting problem.
I have a machine which has to lift 35 kg (this is the total mass of the object and the lifting arm). The lifting is done by a servo motor.
Now I want to calculate the ...
- 13
1
vote
1
answer
76
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Given a current velocity and a fixed input energy, how much faster will a relativistic particle be?
The relativistic kinetic energy of a particle with mass $m$ and velocity $v_0$ is $$m c^2 (\gamma_0 - 1) \textrm{ where } \gamma_0 = \frac{1}{\sqrt{1 - \frac{v_0^2}{c^2}}}$$
I would like to know how ...
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