A particle has initial velocity $$\left( {2\overrightarrow i + 3\overrightarrow j } \right)$$ and acceleration $$\left( {0.3\overrightarrow i + 0.2\overrightarrow j } \right)$$. The magnitude of velocity after 10 seconds will be

A projectile is fired at an angle of 45^o with the horizontal. Elevation angle of the projectile at its highest point as seen from the point of projection, is

A particle moves in a circle of radius 5 cm with constant speed and time period 0.2$$\pi $$ s. The acceleration of the particle is

A missile is fired for maximum range with an initial velocity of 20 m/s. If g = 10 m/s², the range of the missile is