Question

A sled of mass 3kg slides along the ice. It has an initial speed of 5m/s but stops because of friction. How much work is done by friction?

Answer 1

-37.5

Step-by-step explanation:

Answer 2

The work done by friction is 37.5 J.

According to the work energy theorem, the work done by the friction will be equal to the kinetic energy of the sled.

The kinetic energy of the sled is calculated by the formula

KE=
`(1)/(2)mv^(2)`

=0.5*3*5^2

=37.5 J

Therefore the work done the friction is 37.5 Joule.