You push a shopping cart with a velocity of 10 m/s and let go. the cart is 20 kg. the coefficient of kinetic friction is 0.3 ). how far does the cart move?

Free body diagram: force of gravity  pointing down, with normal force  with same magnitude, pointing up.in horizontal direction, there is only friction force  , pointing opposite to direction of motion.so the net force comes from friction force (gravity and normal cancel out).===normal force is  friction force is, with  therefore,  andwe have kinematic equationif initial velocity  final velocity acceleration  then16.989 m, or 20 m for one significant figure.

Earthplanet yplanet y5=earth     *many different equationsplanet x1.5=earthplanet x is two times planet yobject 5,2500 mass5,1,3,2,4object 1 is four times obect 4