Question

need help

Answer 1

A box of mass 20.0 kg is paused and released down an inclined plane. The moment the box is released, its speed is 5.00 m/s. The plane makes a 30 angle with the horizontal. While the box is sliding, kinetic friction increases the thermal energy of the block and inclined plane by 10.0 J. Calculate the speed of the box after the box has moved 1.00 m along the inclined plane. Ingore air resistance.

Calculate the change in gravitation potential energy.
What is the connection between the work done by friction and the increase in thermal energy?
Deduce the work done by the force of gravity.
Using the Work- Energy Theoream, calculate the speed of the box after a displacement of 1.00 m.

Answer 2

hint:
here we have to apply the conservation of energy, including the thermal energy