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Which of these helps to increase frictio...

Which of these helps to increase friction?

A

Oil and grease

B

Ball bearings

C

Treads or grooves

D

Polishing and waxing

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • Choose the correct option for each question. There is only one correct response for each question. Which of these helps to reduce friction?

    A
    Oil and grease
    B
    Grooves and oil
    C
    Spikes and grease
    D
    Grease and grooves

  • Which of the following help to increase the volume of the thoracic chamber during the mechanism of berating ?

    A
    The contraction of diaphragm the
    B
    Contraction of exteranal intercostal muscle
    C
    The up lifting of sternum
    D
    All of the above

  • which of the following describe a frictional force? I. frictional force always opposes the motion of an object. II. Frictional force is parallel to the surface in contact. III. Frictional force always produces heat. IV. Frictional force can be increased or reduced.

    A
    I and II only
    B
    III and IV only
    C
    I, II and III only
    D
    I, II and IV only

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