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Jirya
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What about the force when moving through air?Jirya said:But actually, I'm just interested to know which forces are acting between A and B. A friend of mine claim that only the gravitation force is acting. Is that true?
adjacent said:What about the force when moving through air?
Yes.If your question says air resistance is negligible,it's not relevant.Jirya said:I don't see how that's relevant here? :)
adjacent said:Yes.If your question says air resistance is negligible,it's not relevant.
However,in the OP, you said that you want to know the forces acting on the ball.
You did not say that there's a vacuum there.
Still,there's another force.Think of why the ball is slowing down.Energy is transformed from kinetic to another form.We know that it's not potential energy,soo...
Jirya said:... What are you implying? :-D
adjacent said:Oh sorry.I forgot that you only want the forces acting between A and B.
If the place is a vacuum,then the force(s) acting between A and B is Gravity alone.You're right.
Jirya said:But why is the ball moving up then?
If only gravity works alone you could imagine that the ball should move downwards?
Govind_Balaji said:Think of Newton's laws
Yeah.Read the posts carefully.Rellek said:Are we assuming no air resistance?
Jirya said:Yeah, it's in vacuum.
In general, there are four main types of forces that can affect a ball: gravitational force, normal force, frictional force, and applied force. These forces can act individually or in combination to influence the motion of the ball.
Gravitational force is a force that is exerted by the Earth on all objects with mass. It causes objects to accelerate towards the Earth's center and is responsible for the downward motion of a ball when it is in the air. The strength of gravitational force depends on the mass of the ball and the distance between the ball and the Earth's center.
The normal force is a force that is exerted by a surface on an object that is in contact with it. In the case of a ball, the normal force is equal in magnitude but opposite in direction to the force exerted by the ball on the surface. This force helps to keep the ball in contact with the surface and affects its motion in different ways depending on the angle of the surface and the speed of the ball.
Frictional force is a force that is exerted by a surface on an object in motion. It acts in the opposite direction to the motion of the object and can either slow down or speed up the object depending on the direction of the force. In the case of a ball, frictional force can affect its motion in different ways, such as causing it to roll or slide on a surface.
An applied force is a force that is exerted on an object by an external source. In the case of a ball, this can come from a person kicking or throwing it, or from a collision with another object. Applied force can change the direction or speed of the ball, and its effects depend on the magnitude and direction of the force.