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Homework Statement Question: A cannon shoots a ball at angle Ø above the horizontal ground. Neglecting air resistance, and letting r(t) denote the ball's distance from the cannon, What is the largest possible value of Ø if r(t) is to increase throughout the ball's flight? [hint: Write down r2...

Thank you, makes sense.

1. Show that the variation of pressure with altitude for a planetary atmosphere (assuming constant temperature) is more accurately given by: p = poek(1/r-1/R), where g is taken to vary as 1/r2 (with r being the distance from the centre of the planet), po is the pressure at the surface, R is the...

The units have to be consistent, acceleration = m/(s^2), so when plugging into the formula, length has to be in meters, and time has to be in seconds.

Everything is to be done in the x coordinate. 360km/h = 100m/s = V(final), distance = 1800m Given that, and the formula "V1^2 = V0^2 + 2a(x-x0) ", you should be able to find acceleration. Which should be: 10000 = 0 + 3600a

There is a downward acceleration g (the acceleration by Earth's force of gravity).