Newton's laws question [grade 12]

AI Thread Summary
To find the downward acceleration of the child sliding down the pole, the kinematic equation can be applied, considering the distance of 3.10 m and the time of 2.00 s. The child's weight is calculated as 349.86 N, and since the acceleration is constant, it is not equal to gravitational acceleration. The net force acting on the child can be determined using Fnet = ma, which will help in calculating the upward force of friction. The discussion emphasizes the need to differentiate between free fall and motion with friction to solve for the forces involved. Understanding these principles is crucial for completing the homework problem effectively.
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Homework Statement



A tree house has a vertical "fire pole" of smooth metal, designed for quick exits. A child of mass 35.7 kg slides down the pole with constant acceleration, starting from rest. The pole is 3.10m high. The journey to the ground takes 2.00s.

a) what is the magnitude of the downward acceleration of the child?
b) what is the magnitude of the upward force of friction exerted by the pole on the child?

Homework Equations



Fnet = ma

The Attempt at a Solution



This is what I got so far but I have no idea on how to solve this...any pointers?

Fg = 35.7 x 9.8 = 349.86N

Umm if its constant acceleration or velocity the Fnet is 0 right?
 
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Height of the pole is given. The time taken to slide on the pole is given. Using kinematic equation find the acceleration. Obviously it is not g, because it is not a free fall. It leads to find the frictional force.
 
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