Question

I need some help with this question and it is regarding a wheel chair analysis and human body force analysis. There are no givens in the question, so you can make any assumptions if needed: ("MAKE ANY ASSUMPTION IF NEEDED AND DO NOT COMMENT WITH NOT ENOUGH GIVENS "). I will rate.

a) If the wheelchair is powered by a battery - how many times could it make this run before the battery is exhausted?

b) If you go freewheeling down a ramp, with what velocity would you leave the ramp if you neglect friction?

c) Compression force in spinal column when bending over to lift a 25 lb box. (hint: google spine biomechanics)?

d) Compression force in your hips when lifting one leg during walking. (hint: https://www.slideshare.net/sudheer699/hip-biomechanics )?

e)  Compression force in elbow when lifting a 5 lb weight. (hint: google Hip Biomechanics)?

Answer 1

a)Fully charged power wheelchair batteries last for at least 8 hours and achieves a range of around 10 miles- 20 miles.

b)If you go freewheeling down a ramp, with what velocity would you leave the ramp if you neglect friction?

Velocity of freewheeling down a ramp is given by the equation Vf=Sq root of 4/3 gh

where g is gravitational force and h is height

c)Compression force is equal to clockwise and anti clock wise moments

it depends upon the action limit

Action Limit (AL) = 25lbs. (6/H)(1-.01[V-30])(.7+3/D)(1-F/Fmax)

d)Compression force in your hips when lifting one leg during walking=4/6=2/3

e)Compression force in elbow when lifting a 5 lb weight is given by the equation ΣT where T is torque which is given by the equation T=F*MA

where F is compression force and m represents mass(5 lbs) and A represents acceleration due to gravity