- #1
minimario
- 95
- 2
Homework Statement
Homework Equations
Conservation of energy, F=ma
The Attempt at a Solution
(a) By the conservation of energy, we use points A and C as the initial and final, ## \frac{1}{2} m v^2 - \frac{1}{2} m 2.5^2= (m)(g)(9.76) \Rightarrow v = 14.1 m/s ##
(b) Since ## W_{nc} = \Delta KE - \Delta PE, W = -\frac{1}{2} \cdot 80 \cdot 13.8^2 = --7952 J ##
(c) F = W / d = 146 N
(d)
I do not know what to do for part (D). Can somebody check if parts A-C are correct and give maybe a start at part D?
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