A student slides a 0.75 kg textbook across a table, and it comes to rest after traveling 1.2m.

a student slides a 0.75 kg textbook across a table, and it comes to rest after traveling 1.2m. Given that the coefficient of kinetic friction between the book and the table is 0.34, use the work-kinetic energy theorem to find the book's initial speed.

1 Answer

  • Here frictional force= m*g*coefficient of kinetic friction

    = 0.75 * 9.8 * 0.34

    =2.499 Newton

    Now, Acceleration of the book = force/mass

    =2.499/0.75

    =3.332

    and distance=1.2m

    So using the formula V*V = u*u + 2as

    V= 0 m/s, a=3.332 and s=1.2

    so 0 = u*u +2* (-3.332)*1.2

    therefore, u=2.83 m/s

Hottest videos

Leave a Reply

Your email address will not be published. Required fields are marked *

Related Posts