Sam pushes a 100-kg sack of bread flour on a frictionless


Sam pushes a 10.0-kg sack of bread flour on a frictionless horizontal surface with a constant horizontal force of 4.0 N starting from rest.

(a) What is the kinetic energy of the sack after Sam has pushed it a distance of 20 cm?

(b) What is the speed of the sack after Sam has pushed it a distance of 20 cm?

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Physics: Sam pushes a 100-kg sack of bread flour on a frictionless
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