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SCAN0017

SCAN0017 - 3 How high will a 2.0 kg rock go if it is thrown...

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Unformatted text preview: 3. How high will a 2.0 kg rock go if it is thrown straight up by a person who does 100 J of work on it? ~ . \ ’1.- N‘AQ’Q : AKE : Tm“ Awe. + APE 0 ”1003‘ + mating 1—, (:3 \Co A133: 161.3)“ 5 . tm l 4. A 120 kg crate is pulled across the ﬂoor with‘a constant force of 500 N that is applied at an angle of 25 degrees above the horizontal. For the ﬁrst 20 m of travel the ﬂoor is frictionless and for the next 20 m of travel the coefficient of kinetic friction is 0.25. a. What is the speed of the crate aﬁer 20 m of travel? (.534: b. What is the speed of the crate after 40 m of travel? ‘7—(SDOSW 28310 . 1-— \10 7‘15on 7;; A 0. 2501001333,, 500 \ZO ' yuan :2 lL\ q MIQ 48..., 1 2-: W33 4» we? ...
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