All Questions
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How does gravity do work to a horizontal projectile?
Suppose a ball is moving in a horizontal projection with some velocity $u_0$ in the positive $x$ direction. Here we see that although gravity is perpendicular to the velocity vector, it changes the ...
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2
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The effect of potential energy in the absence of conservative force [closed]
Imagine a hypothetical situation, where we throw a ball from the earth's surface and after certain time $t$ the ball's final velocity is equals to 0. And a that instance, gravity doesn't exist (...
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328
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Why did Trebuchet have so long throwing arms?
Have a look at such an historical Trebuchet:
As you can see, the throwing arm (left) is much longer than the weight arm (right).
Law of conservation of energy says, potential energy from the weight ...
- 103
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Kinetic Energy of Stone
If a stone is launched upward, of which is subject to gravity and air resistance, which of the following will have a greater kinetic energy? The stone at a point on its way up, or the stone at the ...
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