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Often this particular style of question ranks amongst the most poorly answered by students. However, it is often very easy to pick up marks without any knowledge of the subject matter whatsoever. The firs...

S = 14.7, U = 19.6, V =,  A = -g, T = t

using s = ut + 1/2 at^2
14.7 = 19.6t + 1/2 -g t^2
1/2 g t^2 - 19.6t + 14.7 = 0

t = (19.6 +- sqrroot(-19.6² - 4 * 0.5 * 9.8 * 14...

An object will be stable if the centre of mass, the point at which all of the mass of the object is concentrated, is lower to the ground. It will also be stable if there is a wide base. Objects with low c...

(i) Recall that a curve crosses the x-axis (the horizontal axis) when the vertical y-coordinate is zero, so we are required to find all the points such that y=0, that is we must solve the equation x^2...

A substance will float on water if it has a lower density than water. Therefore, ice floats on water simply because it is less dense than water.

Water is unlike other substances in terms of ...