Brush Units
A window washer drops a brush from a scaffold on a tall office building?
A window washer drops a brush from a scaffold on a tall office building. What is the speed of the falling brush after 1.53 s? (Neglect drag forces.) The acceleration of gravity is 9.8 m/s2. Answer in units of m/s. How far has it fallen in that time? Answer in units of m.
i keep getting 11.47041 and that’s not the answer. maybe i’m doing something wrong?
9.8 * 1.53 = 14.994 (speed/velocity)
1/2 * 9.8 * 1.53^2 = 1/2 * 9.8 * 2.3409 = 11.47041 (distance)
If 11.47041 is not the answer, then what is? The proof is in the math. I have done it following the examples of two web sites, and the same answer pops up. Maybe they want you to round up.
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