Toboggan hill#

Santiago (75 $$kg$$) slides on their toboggan down a hill. The hill is 123 $$m$$ long and at an angle of 21$$^\circ$$ to the horizontal. They feel a friction force from the snow $$F\_{fr} =$$ 70 $$N$$ and another force from the wind $$F\_{wind} =$$ 17 $$N$$ blowing 24$$^\circ$$ below the horizontal. The system is Santiago and their sled.

Part 1#

How much work is done by gravity by the time Santiago gets to the bottom of the hill?

Please enter in a numeric value in $$kJ$$.

Part 2#

How much work is done by friction by the time Santiago gets to the bottom of the hill?

Please enter in a numeric value in $$kJ$$.

Part 3#

How much work is done by the wind by the time Santiago gets to the bottom of the hill?

Please enter in a numeric value in $$kJ$$.

Part 4#

If Santiago’s inital speed at the top of the hill is $$v =$$ 2 $${m\over s}$$, what is their speed at the bottom of the hill?

Please enter in a numeric value in $$m/s$$.