01 Sp 1h Lecture Qu X A ball thrown upward x c O wwwwebassign netweb/student/Ass

Question

01 Sp 1h Lecture Qu X A ball thrown upward x c O wwwwebassign netweb/student/Assignment-Responses/submit?dep 15426445 Student l My UNC ch MUNccinbox Moodle O canvas D Bology,Bs e Psych Minorpdr D Medical Bngades at EXERCISE HINTS: GETTING STARTED I ITM STUCK! A projectile is launched straight up at 62.5 m/s from a height of 83 m, at the edge of a sheer cliff. The projectile falls, just missing the cliff and hitting the ground below. (a) And the maximum height of the projectile above the point of firing. (b) Find the time it takes to hit the ground at the base of the cliff. c) Find its velocity at impact. Need Help? 1 points A tennis player on serve tosses a ball straight up. As the tennis ball travels through the air, its speed does remains the same decreases and then increases ncreases and then decreases B a

Explanation / Answer

here,

initial speed , u = 62.5 m/s

h0 = 83 m

a)

let the maximum height be h1

- 2 * g * h1 = v^2 - u^2

- 2 * 9.8 * h1 = 0 - 62.5^2

h1 = 199.3 m

the maximum height reached is 199.3 m

b)

let the time taken be t

-h0 = u * t - 0.5 * g * t^2

- 83 = 62.5 * t - 0.5 * 9.8 * t^2

t = 13.97 s

c)

the velocity of impact , v = u - g * t

v = 62.5 - 9.8 * 13.97

v = - 74.4 m/s

the velocity of impact is 74.4 m/s

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