Recent content by jadiepants

thank you so much :)

- I'm under the impression that a canon ball being fired is projectile - the acceleration in the y direction is -9.8, but what use is that when I don't know the initial velocity or how high it goes? - I don't know when it will be zero because I don't have any other information. If I'm...

Homework Statement A canon ball is fired from a canon upwards at an angle above the horizontal. a. Sketch a graph showing the height of this canon ball over time if it was fired at 30°, 45° and 60° above the horizontal. b. Sketch showing the acceleration of the canon ball over time if it was...

Thanks for that :) It is pretty vague, my friend suggested I put something silly like 'the colour of the object' I will put down surface area and speed only when calculating kinetic friction.

That tells me what does contribute, but I need to know what does not contribute.

Homework Statement What two things do not contribute to friction (i.e. what is friction not dependent upon)? Homework Equations - The Attempt at a Solution After googling I have read that it is speed and surface area - but they had no explanations. I don't understand how either of...