If someone pressed the brakes and went flying forward what is newtons law that is being demonstrated​

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.

Why do different substances have diffrent properties

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?