1.What is the path (trajectory) of a projectile launched at an angle to horizontal?
2.At what angle of projection is the horizontal range of a projectile maximum?
3.Define centripetal acceleration and write its formula.
4.State the time of flight formula for a projectile.
5.A projectile is launched with velocity $20 \text{ m/s}$ at $30^\circ$ to horizontal. Find max height and range ($g=10\text{ m/s}^2$).
6.A body moves in a circle of radius $5 \text{ m}$ with constant speed $10 \text{ m/s}$. Find centripetal acceleration.
7.A river is flowing at $3 \text{ km/h}$. A swimmer can swim at $4 \text{ km/h}$ in still water. Find resultant velocity if he swims perpendicular to flow.
8.Show that projection angles $\theta$ and $(90^\circ - \theta)$ yield equal horizontal ranges.
