(a) State two objects each used in sports and warfare which may be considered as...
PHYSICS
WAEC 2003
(a) State two objects each used in sports and warfare which may be considered as projectiles.
(b) the horizontal range R, of a projectile is given by the expression;
R = \(\frac{u^2 sin 2\theta}{g}\) where \(\theta\) is the angle of projection, g the acceleration of free fall due to gravity and u the initial velocity. At what value of \(\theta\) will R be maximum?
Explanation
(a) Projectiles are used in;
(i)Sports as – Shortput, football, javelin etc
(ii) Warfare a bullet, spear,arrow etc.
(b) A R maximum \(\theta\) = 45°
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