Acceleration on inclined plane less than acceleration due to gravity

Q.  A block sliding down an inclined plane has acceleration _________ acceleration due to gravity.
- Published on 21 Sep 15

a. less than
b. greater than
c. same as
d. none of the above

ANSWER: less than

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    Discussion

  • Sravanthi   -Posted on 15 Dec 15


    According to Newton's 2nd law, rate of change of linear momentum is directly proportional to impressed force.

    Force = mass x acceleration

    Force acting in downward direction = mg sin θ

    Therefore, mg sin θ = ma

    Acceleration of sliding block = acceleration due to gravity x sin θ

    Hence, it is proved that acceleration of block ABCD sliding down an inclined plane is less than acceleration due to gravity.

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