A block is launched with a speed of 10 m/s at the base of a smooth ramp indined at an angle of 30 with the horizontal. A plateau of height 1.8 m is located at the top of the ramp, as shown in the diagram. The speed (v) of the block at its maximum height is equal to 10 m/s 30 1 .8 m /1 mark a. 8.0 m/s b. 4.0 m/s c. 5.9 m/s d. 8.7 m/s e. 7.0 m/s