If the vectors 
and 
are the sides of a triangle ABC, then the length of the median through A is:
(1) 
(2) 
(3) 
(4) 
[JEE Main 2013]
Category Archives: JEE Main
A projectile is given an initial velocity of $$\hat i + 2\hat j$$
A projectile is given an initial velocity of 
, where 
is along the ground and 
is along the vertical. If g = 10 m/s2, the equation of its trajectory is:
(1) 
(2) 
(3) 
(4) 
[JEE Main 2013]
Continue reading A projectile is given an initial velocity of $$\hat i + 2\hat j$$
Plano-Convex Lens Having 3 mm Thickness
Diameter of a plano – convex lens is 6 cm and thickness at the centre is 3 mm. If speed of light in material of lens is 
m/s, the focal length of the lens is:
(1) 15 cm (2) 20 cm (3) 30 cm (4) 10 cm
[JEE Main 2013]