An attacker at the base of a castle wall 3.65m high throws a rock straight up with speed 7.40m/s at a height of 1.55m above the ground. a). will the rock reach the top of the wall?
b). if so, what is the rocks speed at the top? if not, what initial speed must it have to reach the top?

Consider motion in one dimension. (the sign of the vector quantities is their direction indicator.) an object moves in the positive x-direction with speed 2.9 m/s for 4.5 s. it stops for 3.8 s and then moves in the negative x direction with speed 2.8 m/s for 4 s. what is the total distance traveled by the object in units of meter? enter a number with two digits behind the decimal point.