Some Examples on Interaction OF 2 Object||Muzz Level-Gun Bullet||Canon Canon Shell

A car 2 m long and 3 m wide is moving at 13m/sec when a bullet hits it in a direction making an angle theta=tan^(-1) 3//4 with the car as seen from the street. The bullet enters one edge of the comer and passes out at the diagonally opposite comer. Neglectingany interaction between bullet and car find the time for the bullet to cross the car :

A canon is fired at an angle theta(0le theta le(pi)/(2)) with the horizontal. If 'v' is the intial velocity of the canon ball, the height 'h' of the ball at time 't', ignoring wind resistance, is given by h=(v sin theta)t-4.9t^(2) . (a) Will be ball return to the ground? (b) How far will the ball have travelled horizontally at the time it hits the ground, assuming there are no forces in the horizontal direction? (c ) Determine 'theta' so that the horizontal range of the ball is maximum.

In the given picture what is the relationship between (1) and (2) with respect to population interaction and between (3) and (4) with respect to trophic levels ?