Please answer the following question. G Item 7 A orate on a motorized oart start

Question

Please answer the following question. G Item 7 A orate on a motorized oart starts from rest and moves with a 2.70 constant eastward aooeleration of a m/s A worker assists the cart by pushing on the crate with a force that is eastward and has magnitude that depends on time a e previous 7 of 8 Part A What is the instantaneous power supplied by this foroe att 460 s? Express your answer to three significant figures and include the appropriate units. P. Value Units My Answers Give Up Provide Eeedback Continue

Explanation / Answer

item 8
A)

k = spring constant = 190 N/m

x = compression of the spring = 0.0230 m

work done = spring potential energy = (0.5) k x2 = (0.5) (190) (0.023)2 = 0.050255 J

B)

kinetic energy = work done

(0.5) m v2 = 0.050255

(0.5) (4.50) v2 = 0.050255

v = 0.15 m/s

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