You are trying to escape a hoard of Zombies (again) and must make an elevator to

Question

You are trying to escape a hoard of Zombies (again) and must make an elevator to get down a cliff (25 m deep) as fast as possible. Not having time to do the calculations, you throw a bunch of rocks onto a make-shift sled and hope for the best. As you fall you have time to contemplate your fate.

A)Identify your coordinates.

B)Using Force, determine your acceleration as you fall. Your mass (m2) is 100 kg and the sliding mass (m1) is 150 kg and the coefficient of kinetic friction is 0.2.

C)As you cannot hit the ground faster than 10m/s and expect to survive, determine your fate as you land by comparing speeds or accelerations to those expected for survival.   Assume the sliding surface is horizontal and the drop is vertical.

Note that a = 2.7 m/s2 and vfinal is 11.7 m/s. Set up your coordinates and add all forces acting in X and Y.

8. You are trying to escape a hoard of Zombies (again) and must make an elevator to get down a cliff (25 m deep) as fast as possible. Not having time to do the calculations, you throw a bunch of rocks onto a make-shift sled and hope for the best. As you fall you have time to contemplate your fate. A)Identify your coordinates. B)Using Force, determine your acceleration as you fall. Your mass (m2) is 100 kg and the sliding mass (m) is 150 kg and the coefficient of kinetic friction is 0.2. C)As you cannot hit the ground faster than 10m/s and expect to survive, determine your fate as you land by comparing speeds or accelerations to those expected for survival. Assume the sliding surface is horizontal and the drop is vertical Note that a = 2.7 m/s2 andydunal is X and Y. 1.7 m/s. Set up your coordinates and add all forces acting in in mig

Explanation / Answer

Writing the force equation for both the blocks we have

m2g - T = m2a --------(1)

T - um1g = m1a -----(2)

adding both we have

g(m2 - um1) = a(m1+ m2)

a = 9.8*(100 - 0.2*150) / (100 + 150)

a = 2.744 m/s2

Vy ^2 2 - uy^2 = 2aH

Vy^2 - 0 = 2*2.744*25

Vy = 11.7 m/s

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