MENU
Question -

Read each statement belowcarefully, and state, with reason, if is true or false :
(a)During rolling, the force of friction acts in the same’direction as thedirection of motion of the CM of th body.
(b) The instantaneous speed of the point of contact during rolling is zero.
(c) The instantaneous acceleration of the point of contact during rolling iszero.
(d) For prefect rolling motion, work done against friction is zero.
(e) A wheel moving down a perfectly frictionless inclined plane will undergoslipping (not rolling) motion.



Answer -

(a) True (The forceof friction helps in rolling a body).
(b) True (Arolling body is considered as a rotating body about an axis passing through thepoint of cotact).
(c) False (Sincethe body is rotating, so its instantaneous acceleration cannot be zero).
(d) True (Sincepoint of contact is at rest, so work done is zero).
(e)True (In case of frictionless inclined plane, there is notangential force of friction (or torque) and hence wheel cannot roll).

Comment(S)

Show all Coment

Leave a Comment

Any questions? Ask us!
NodeJS Interview Questions Answers
ASP.Net Interview Questions Answers
Interview Questions Answers
×