Physics, 12.12.2019 21:31 avi46

While the cart is moving along an aisle, it comes in contact with a smear of margarine that had recently been dropped on the floor. suddenly the friction force is reduced for -40.0 newtons to -20.0 newtons. what is the net force on the cart if the "pushing force" remains at 40.0 newtons? does the grocery cart move at constant velocity over the spilled maragine?

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