Physics help?

Question

A window washer drops a brush from a scaf-
fold on a tall office building.
The acceleration of gravity is 9.8 m/s2 :
What is the speed of the falling brush after
1.51 s? ( Neglect drag forces.) Answer in
units of m/s.

How far has it fallen in that time? Answer in
units of m.

Answer 1

Use
y(t)=-.5*g*t^2
and vy=-g*t

The speed is
-9.8*1.51
-14.8 m/s

The distance is
-.5*9.8*1.51^2
-11.2 m

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