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 $$\hat i + 2\hat j$$
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]
More than one option may be correct.
Continue reading JEE Advanced 2013 Physics Electrostatics Solution
Q: For waves, why is 
Continue reading Why, Frequency = 1/Time?
Match the following (multiple matches are possible) in the context of rolling motion:
| Column I | Column II |
| (A) Angular Momentum = $\displaystyle M{{{\vec{r}}}_{CM}}\times {{{\vec{v}}}_{CM}}+{{I}_{CM}}\overrightarrow{\omega }$ (B) Kinetic Energy = $\displaystyle \frac{1}{2}Mv_{CM}^{2}+\frac{1}{2}{{I}_{CM}}{{\omega }^{2}}$ (C) Kinetic Energy = $\displaystyle \frac{1}{2}{{I}_{\text{Point of Contact}}}{{\omega }^{2}}$ (D) vcm=Rω |
(p) Pure rolling (q) Rolling (r) Pure rotation about the point of contact |
