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7) While pushing a cart across a floor, Andrea and Jennifer exert forces ?? and ??...

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Physics

7) While pushing a cart across a floor, Andrea and Jenniferexert forces ?? and ?? on the cart. Andrea’s

force is due north with a magnitude of 130.0 N and Jennifer’sforce is 32° west of north with a magnitude of 180.0 N. (a) Findthe net force in component form. (b) Find the magnitude anddirection of the net force. (c) If Andrea and Jennifer’s housemate,David, disagrees with the move and wants to prevent its relocation,with what force should he push with so the cart does not move?(assume there is not friction on the cart)

8) A car with a mass of 1000.0 kg accelerates from 0 to 90.0km/h in 10.0 s. (a) What is its acceleration? (b) What is the netforce on the car?

9) A body of mass ? moves in a horizontal direction such that attime t its position is given by
?(?) = ? cos(?? + ?) where ?, ?, and ?are constants. What is thetime dependent force acting on the body

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