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Course Home a MasteringPhysics: HW-Ch06 CSecure https://session.masteringphysics.com/myct/itemView?assignmentProblemID-858158198offset-next HW-Ch0 Item 8 Resources « previous 8 of 10 I next s Item 8 Part A A crate on a motorized cart starts from rest and moves with a constant eastward acceleration of a-2.30 m/s2 .A worker assists the cart by pushing on the crate with a force that is eastward and has magnitude that depends on time according to F(t) = (5.40 N/s)t. what is the instantaneous power supplied by this force at t = 5.00 s ? Express your answer to three significant figures and include the appropriate units. PValue Submit My Answers Give Up Provide Feedback

Explanation / Answer

Power (P) = Force(F) x Velocity(v)

1st equation of motion

v = u + at

v = 0 + (2.30 x 5)

v = 11.5 m/s

Now
F(5 sec) = 5.40 x 5 = 27 N

Now

P = F x V

P = 27 x 11.5

P = 310.5 W

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