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Choose the correct answer from the choices. Encircle the letter of the answer.

1.The force that opposes motion is ___.
a.friction b.motion c.force

2.Friction causes an object that moves along a surface to slow down and eventually ___.
a.turn b.stop c.moves back and forth

3.The type of ___ increases or decreases the distance travelled by moving objects.
a.mass b.surface c.force

4.___ allows us to grip or hold things.
a.friction b.mass c.gravity

5.When does friction become undesirable to humans?
a.When it allows things be gripped or hold.
b.When it makes objects difficult to move.
c.both a and b​