# physics

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A 90.0 N grocery cart is pushed 14.0 m along an aisle by a shopper who exerts a constant horizontal force of 40.0 N. If all frictional forces are neglected and the cart starts from rest, what is the grocery cart's final speed?

• physics -

mg = 90 N.
m = 90 / 9.8 = 9.18 kg = Mass of cart.

a = Fap / m = 40 / 9.18 = 4.36 m/s^2.

Vf^2 = Vo^2 + 2a*d,
Vf^2 = 0 + 8.71*14 = 121.96,
Vf = 11.0 m/s.

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