Hello everyone, i'm new to this forum. I am kinda having trouble with a physics problem. Could someone please help me out with 3 problems. Thanks. A rocket is fired vertically with an upward acceleration of 27 m/s2. After 21 s, the engine shuts off and the rocket continues as a free particle until it reaches the ground. (a) What is the highest point the rocket reaches? km (b) What is the total time the rocket is in the air? s (c) What is the speed of the rocket just before it hits the ground? m/s =================================================== Two stones are dropped from the edge of a 200-m cliff, the second stone 1.3 s after the first. (a) How long after the second stone is dropped will the separation between the two stones be 35 m? s (b) At this point, how far below the clifftop is the second stone? m ==================================================== A particle undergoes three successive displacements in a plane, as follows: 2.0 m southwest, 5.0 m east, and 8.0 m in a direction 60.0° north of east. Choose the y axis pointing north and the x axis pointing east. (a) Find the components of the first displacement. m east and m north Find the components of the second displacement. m east and m north Find the components of the third displacement. m east and m north (b) Find the components of the resultant displacement. m east and m north (c) Find the magnitude and direction of the resultant displacement. m at an angle of ° North of East (d) Find the displacement that would be required to bring the particle back to the starting point. m i + m j. I got some fromt the last one correct but am having trouble with the whole concept.