PLEASE I NEED HELP!

Question #8

(30%)) Problem 8: A rock is thrown off a vertical cliff at an angle of 5 50 above horizontal. The cliff is 65.4 m high and the ground extends horizontally from the base. The initial Speed of the rock is 22. 7111;\"3. Neglect air resistance. u \"may\". ..~ , a 17% Part (a) To what maximum height, in meters, does the rock rise above the edge of the cliff? Grade Summary 31 : i Deductions 0% Dnhunh'ql 1 an n/.. 17% Part (b) How far, in meters, has the rock moved horizontally at the moment it reaches its maximum height? 17% Part (c) How long, in seconds, after being thrown does the rock hit the ground? 2' B 17% Part (:1) How far from the base of the cliff, in meters, is the landing point of the rock? at 5 1T% Part (o) How high above the ground, in meters, is the rock 2. 73 s before it hits the ground? h_ 3 17% Part (f) How far horizontally from the cliff, in meters, is the rock 2. 73 s before it hits the ground? F 17% Part (a) Select all vectors with an x component of zero. None of the vectors have an x component of zero. O V 4 O 2 0 3 015 1T% Part (b) Select all vectors with a :9 component of zero. C] None of the vectors have a y component of zero. 17% Part (c)_Select all vectors with a negative x component. A None of the vectors have a negative x component. O 4 0 2 0 3 0 117% Part (d) Select all vectors with a negative y component. None of the vectors have a negative y component. O 0 4 0 2 O 317% Part (e) Select all vectors with a positive x component. None of the vectors have a positive x component. O 0 4 O O17% Part (f) Select all vectors with a positive y component. O None of the vectors have a negative y component. 0 4 0 2 0 3 O 1Problem 3: The velocity of a polar bear is given by vector u = (-21.8 km/h, -14 km/h).50% Part (a) How fast is the polar bear moving, in km/h? 1 =4 50% Part (b) In what direction is the polar bear moving? Express your answer as an angle measured in degrees below the negative x-axis. Grade Sum 8 = Deductions