Recent content by johanMT

I have the impression that you expect me to know physics very well, I'm not a physicist and I know the basics, but I have to practice to pass it in college.

When we hit the ball, we hit it off the floor and it travels along a path and ends up on the ground again. y denotes the height, but since there is no height, the conclusion is that the height is zero, so we assign the value zero to y. For t, we include the fall time, which is 3 seconds as...

Ok, I see that you didn't say anything specific or help, so let me explain how it should have been done. So, in the part under a, the ball is on the ground, so its height is zero. y=0 y=v* sin alpha* t - 1/2*g*t^2=0 from this we derive the initial velocity v=29.43 m/s This v insert into the...

This is from the exam, that's why I asked

Yes I see this, this is Magnuss efect.

if I hit a ball that is at rest on the ground at an angle of 30, it means that it has no speed in the x component because it is at rest, but it has a speed in the y component because gravity acts on it

I don't have a given path in the task, and I'm looking for speed, which means that I will then have two unknowns in the equation, speed and path, and I only need speed.

Ok ,then I really don' t know this part.

In part b isn't half of the upward trajectory when time t is half?

In a) Part you should find the initial speed, it just says that the ball is at rest according to that logic it should be that the initial speed is zero, but then how to calculate how far it fell when the formula for range requires knowledge of the initial speed, and from this it turns out to me...

Task: A football player hits the ball, which is at rest on the ground, so that it moves at an angle of 30° in relation to the horizontal plane and falls to the ground again after 3 seconds. a) How far from the point of impact will the ball fall? b) Calculate the velocity vector of the ball on...