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7. Alma found out that it was easier to push a cart barefooted than when she was wearing
shoes along the cemented floor. What causes this difference?

A. Surface of the floor is smooth.
B. Mass of the wheelbarrow at the load
C. Friction is greater between the wheels of the cart and the shoes.
D. Friction between the bare feet and the ground is greater than with shoes.​

Sagot :

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Answer:

7.C.Friction is greater between the wheels of the cart and the shoes