a) Average velocity = \(\frac{u + u}{2}\)
From equation V = u + at
Aeverage velocity = \(\frac{u + u + at}{2}\) = \(u + \frac{1}{2} at\)
Distance covered = Ave. vel. x time
x = (u + \(\frac{1}{2}\)at)t
x = ut +s~(b)i) Newton's second law of motion states that the of change of momentum is proportional to the lied force and takes place in tho direction of the force.
(ii) The principle of conservation of energy es that energy is neither created nor destroyed can be changed from one form to another. The law of floatation states that an object wil t in a fluid when the upthrust exerted upon it by fluid in which it floats equals the weight of the
(c) Mass of air displaced = mass of ballon on and contents V x density of A air
= V x density of gas + content
V x 1.29 = v x 0.54 + 0.030
V = \(\frac{0.03}{0.75}\) = 0.04m\(^3}\)
~(c) Mass of air displaced = mass of ballon on and contents V x density of A air
= V x density of gas + content
V x 1.29 = v x 0.54 + 0.030
V = \(\frac{0.03}{0.75}\) = 0.04m\(^3}\)
