6.which of the following surfaces has the least frictional force?
a.wet floor
b.rubber mat
c.sand
d.tiled floor
7. a ball is rolled on the floor. after some time, the ball came to a stop.what caused the ball to stop?
a. gravitational force
b.frictional force
c.air in the suroundings
d.the floor
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Answer:
6. A.
7. B.
Explanation:
6. wet floor is slippery it sure has the least frictional force.
7. The ball came to stop because the friction caused by the rolling on the floor(maybe the floor is rough) , and so it made the ball stop.