ent/Assignment, p c lus. of Housing CH2HW- Motion in C http://wwww The choice of

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ent/Assignment, p c lus. of Housing CH2HW- Motion in C http://wwww The choice of the time defined as t= 0 is arbitrary and up to you to select as the problem solver. As an example of this arbitrariness, choose t 0 as the time at which the stone is at the highest point in its motion. Then solve parts (C) and (D) again using this new initial instant and note that your answers are the same as those above. HINTS: GETTING STARTED I IMSTUCK MASTERIT A projectile is launched straight upward at +57.5 m/s from a height of 87.0 m, at the edge of a sheer cliff The projectile falls, just missing the cliff and hitting the ground below. (a) Find the maximum height of the projectile above the point of launch. (b) Find the time it takes to hit the ground at the base of the cliff c) Find its velocity at impact. (Indicate the direction with the sign of your answer.) m/s Need Help? Resd Read It Submit Assignment Save Assignment Progres Home My Assignments Extension Request

Explanation / Answer

a)

Hmax above the cliff

hmax = u^2/2g

Hmax = 168.68 m

b)

S = ut +0.5at^2

S = -87

u = 57.5

a = -9.8

solving we get

t = 13.1 sec

c)

V = u-gt

V = -70.79 m/sec

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