Need some help with these 2 question thanks How high is the cliff? Express your

Question

Need some help with these 2 question thanks

How high is the cliff? Express your answer to two significant figures and include the appropriate units. A ball is thrown toward a cliff of height h with a speed of 26 m/s and an angle of 60° above horizontal. It lands on the edge of the cliff 3.6 s later You may want to review (Page 80) For help with math skills, you may want to review: Resolving Vector hValue Units Submit ues For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Dock jumping Part B What was the maximum height of the ball? Express your answer to two significant figures and include the appropriate units. haas Value Units hmar- Submit Part C What is the ball's impact speed? Express your answer to two significant figures and include the appropriate units. OI | u=| Value Units |

Explanation / Answer

a) h = 26*sin60*3.6 - 4.9 *3.62

h = 17.555 m

b)v2 = u2 - 2*9.8*h
v = 0
u = 26 sin 60
h = 25.86m

c)

v = sqrt[ (26cos60)2 + (26sin60 - 9.8x3.6)2] =18.21m/s

B)

Turnthem into vectors (calculate each one's x and y speed) and subtract A from B

Turn the resultant vector into a speed and direction

Ship A
x = 30 x sin(305) = -24.57 mph
y = 30 x cos(305) = 17.20 mph

Ship B
x = 40 x sin(35) = 22.94 mph
y = 40 x cos(35) = 32.76 mph

B - A:
x = 22.94 - (-24.57) = 47.51 mph
y = 32.76 - 17.20 = 15.56 mph

Relative speed = sqrt ( x^2 + y^2) = sqrt (47.512 + 15.562) = 49.993 mph

Distance between two ships after 2 h = 49.993*2 = 99.986 miles

Spedd of Ship A as seen by B = 49.993 mph

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