Question

a) A roller coaster moves 200 ft horizontally and then rises 135 ft at an angle of 30.0° above the horizontal. Next, it travels 135 ft at an angle of 40.0° below the horizontal. Use graphical techniques to find the roller coaster's displacement from its starting point at the end of this movement.

b) A plane flies from base camp to lake A, a distance of 280 km at a direction of 20.0° north of east. After dropping off supplies, the plane flies to lake B, which is 190 km and 30.0° west of north from lake A. Graphically determine the distance and direction from lake B to the base camp.

c) A brick is thrown upward from the top of a building at an angle of 40° to the horizontal and with an initial speed of 10 m/s. If the brick is in flight for 2.8 s, how tall is the building? ________ m

Answer 1