Question

A towed wheel with rolling radius of 0.35 m and normal load of 500 N requires a horizontal force of 50 N to move it forward. The vertical soil reaction against the wheel can be considered to act ahead to vertical line passing through the wheel at a distance of ________

(a) 3.18 * 10^-1 m

(b) 3.5 * 10^-1 m

(c) 3.18 * 10^-2 m

(d) 3.5 * 10^-2 m

I got this question in unit test.

My question is taken from Tractor Classification and Details topic in division Lubrication System and Tractor’s Classification of Farm Machinery

Answer 1

Correct answer is (d) 3.5 * 10^-2 m

Explanation: (T.F.) * r = R. e

e = \(\frac{[(T.F.).r]}{R}=\frac{50*0.35}{500} \)

= 3.5 * 10^-2 m.