Answer:
Explanation:
work done by gravitational force
mgsinθ x d , m is mass of box , θ is angle if inclination , d is displacement
= 10 x 9.8 x sin17 x 12
= 343.83 J
this work will be positive
work done by frictional force
= force x displacement
20 x 12
= 240 J
this work will be negative
net positive work done on box
= 343.83 J - 240 J
= 103.83 J
This work will be converted into kinetic energy .
So kinetic energy of box at the bottom of ramp
= 103.83 J .
