- #1
cheechnchong
- 132
- 1
A motorcycle (mass of cycle plus rider = 2.5 x 10^2 kg) is traveling at a steady speed of 20.0 m/s. The force of air resistance acting on the cycle and rider is 2.00 x 10^2 N. Find the power necessary to sustain this speed if the road is sloped UPWARD 37.0 degrees with respect to the horizontal.
OK this is how I am doing this problem (Check my work on here)
First Step (finding net force):
Fnet = Wsin37 + Fa (exerted) = (250)(9.8)sin37 + 200 = 1674 N (briefly, Just tell me if it's sin or cos here! -- main confusion)
Second Step (finding power from givens):
P = (Fcos37) V = (1674cos37) (20) = 2.67 x 10^4 W
Again, Just check my work to see if i am doing it correctly. If not, then please give me a little help -- hint: I am bad with conceptual understanding (try to help me visual what i did wrong!). Thanks and sorry if I am asking for too much!
OK this is how I am doing this problem (Check my work on here)
First Step (finding net force):
Fnet = Wsin37 + Fa (exerted) = (250)(9.8)sin37 + 200 = 1674 N (briefly, Just tell me if it's sin or cos here! -- main confusion)
Second Step (finding power from givens):
P = (Fcos37) V = (1674cos37) (20) = 2.67 x 10^4 W
Again, Just check my work to see if i am doing it correctly. If not, then please give me a little help -- hint: I am bad with conceptual understanding (try to help me visual what i did wrong!). Thanks and sorry if I am asking for too much!