Physics Past Questions and Answers

A body is projected with an initial velocity <b>u</b> at angle \(\theta\) to the horizontal. If \(R_{max}\) is the maximum range of the projectile, what does the relation \(\frac{u^{2}}{R_{max}}\) represent?

An object at rest is said to possess

According to Newton's law of cooling, the heat energy lost per unit area of a body depends on the<br/>I. Surface area<br/>II. Nature of the surface<br/>III. Temperature of the surface<br/>IV. Excess temperature over the surroundings

The graph of density against temperature for water is correctly illustrated by

A football is kicked at an angle of 45° to the horizontal over a defense line up with a velocity of 15\(ms^{-1}\). Calculate the magnitudeof horizontal velocity of the ball at its highest point [Neglect friction, g = 10\(ms^{-2}\)].