Question

Can someone please help with this problem? Thanks!

What propulsion torce is needed to keep the car moving forward at a constant speed? Express your answer to two significant fiqures and include the appropriate units Review Constants Periodic Table Driving on asphalt roads entails very litle rolling resistance, so most riving skwly in ry ad isangler story If a 170 kr rar is driven n sand at 5.0 m/s, the coeticient of rolling friction is DO5, In this Value Units case, nearly all of the energy that the car uses to move goes to overcoming rolling triction, so you can ignore air drag in this problem. Request Answer Submit Part B What power is required for propulsion at 6.0 m/s? two significant figures and include the appropriate units. Express your answe Value Units Request Answer Submit Part C gets 15 miles per gallon when driving sand, what is the car's efficiency? One gallon of gasoline contains 1.4 x 10" Jof chemical energy, one mile is 500 Express your answer using two significant figures. " ΑΣφ

Answer 1

SolutionPart A opdon force needed= F oR F = o6X 70o X 9, 999. 6 3 N 3 hоX1о Part B Power ГоxIо х 6. wat oR Wat со X13 by Car, Rer galon Fx diadance Рart C 7 wak cdone дraoltne oxlox 5X160 2141350 J Workdone Efeceny Xloo 2.4135x lo их -Xl0o e